Ellipse Tube Plugs

Ellipse tube plugs finish open ends on hollow metal furniture legs with ellipse cross-sections. The ellipse profile is more elongated and pointed at the ends than a standard oval, and only an ellipse-specific plug matches the geometry correctly. Press-fit PE body with flexible internal walls grips the curved interior without adhesive or tools. ellipse tube plugs for furniture with ellipse tubing. Wall thickness 1 to 2 mm. Black and white. Sold in packs of 4.

$0.93$1.40

4 = 1 chair · 8 = 2 chairs · 24 = 6 chairs

Item Number Not Available Product Type

Not sure what size? See the size chart ↓

📦 Sold in packs of 4 — quantity adjustable at checkout

Overview

Ellipse Tube Plugs

Oval and ellipse look similar at first glance. Both have two different axes and continuous curves. The difference is at the ends: oval tubes have rounded, blunt ends. Ellipse tubes have pointed, tapered ends that taper to a narrower profile. No oval plug fits an ellipse tube correctly because the curves diverge at exactly those pointed ends. Ellipse tube plugs are molded to match the elongated, tapered geometry of true ellipse tubing. The plug body press-fits inside the tube with flexible internal walls that follow the ellipse curve at every point, including the tapered ends where oval plugs fail.

PE (polyethylene) construction. Press-fit installation with no adhesive, no screws, and no tools beyond an optional rubber mallet. Ellipse tube plugs come in : 15 × 30 mm and 20 × 40 mm. Black and white. Ellipse tube plugs for furniture with ellipse tubing on chairs, bar stools, display fixtures, and any application where the tube profile is a true ellipse. Ellipse tube end plugs that seal, protect, and finish every open ellipse tube end. Sold in packs of 4.

Available Sizes: 2 Ellipse Tube Plugs

Ellipse tube plugs are listed by short axis × long axis. Each size matches a specific ellipse tubing specification. ellipse tubing is a specialized profile, less common than round or rectangular, so the current range focuses on the two most frequently used sizes in modern furniture manufacturing.

15 × 30 mm

Wall: 1.5 to 2 mm. The smaller ellipse for lightweight chair components, narrow structural members, and compact display fixture tubing. The 2:1 aspect ratio creates a noticeably elongated profile with distinctly tapered ends. Black and white.

20 × 40 mm

Wall: 1 to 2 mm. The larger ellipse for standard dining chair legs, bar stool frames, and commercial seating. Same 2:1 aspect ratio at a wider profile. The most common ellipse tubing size in furniture. Black and white.

For oval tubes (rounded, blunt ends), see oval tube plugs (10 × 33 to 30 × 50 mm). For D-shaped tubes (one flat side), see half-oval tube plugs. For round tubes, see round tube plugs. For custom ellipse sizes, contact Business Solutions.

How to Measure Your Tube

Three measurements: short axis (width), long axis (length), and wall thickness. ellipse tubing has two different outside dimensions, and both must match the plug specification. Both available sizes share a 2:1 aspect ratio (the long axis is exactly twice the short axis).

Step 1. Measure the short axis

Use calipers across the narrowest point of the ellipse opening, outside edge to outside edge. This is the first number in the size designation (15 or 20 mm for ellipse tube plugs).

Step 2. Measure the long axis

Use calipers across the widest point of the ellipse, outside edge to outside edge. This is the second number (30 or 40 mm). The long axis is always perpendicular to the short axis and runs through the pointed ends.

Step 3. Measure the wall thickness

Use calipers at the tube end. The 15 × 30 requires 1.5 to 2 mm wall. The 20 × 40 requires 1 to 2 mm wall. Check at both the narrow center and the pointed ends, as wall thickness can vary along the ellipse curve.

Ellipse vs. oval: if your tube ends are pointed or tapered, it is ellipse. If the ends are rounded and blunt, it is oval. The two shapes are similar but the plugs are not interchangeable. Measure carefully and compare the end profile. Ellipse tube plugs only fit the true ellipse cross-section with tapered ends.

How to Install

Same press-fit concept as all our tube plugs. Ellipse tube plugs must enter the tube with the short axis aligned to the short axis and the long axis aligned to the long axis. The plug will not fit if rotated 90° because the two axes are different lengths. The tapered ends provide a natural alignment guide: the plug’s pointed ends slide toward the tube’s pointed ends.

What you need
  • The correct ellipse tube plug matched to your short axis, long axis, and wall thickness
  • A rubber mallet (optional)
  • Clean, dry tube ends free of burrs or debris
Installation steps
  1. Inspect the tube end. Remove any burrs, sharp edges, or debris from the inside. ellipse tubes can have slight seam irregularities, particularly at the pointed ends where the curve tightens.
  2. Align the ellipse tube plug with the tube opening. Match the pointed ends of the plug to the pointed ends of the tube. The short axis aligns to the short axis.
  3. Press the plug into the tube by hand. The flexible walls compress as the plug enters, then expand against the ellipse interior. Apply even pressure across the entire head.
  4. If needed, tap the plug head gently with a rubber mallet. Apply force to the center of the head. The tapered ends are the thinnest parts of the plug and should not be struck directly.
Removal: pry gently from one of the pointed ends with a flat-head screwdriver. The tapered ends provide natural leverage points. The PE body flexes without breaking. Ellipse tube plugs can often be reinstalled if undamaged.

What Ellipse Tube Plugs Solve

The same four problems as every other tube plug, applied to a cross-section that only ellipse-specific plugs can handle. The National Wood Flooring Association (NWFA) recommends protective measures on all furniture legs, and ellipse tube plugs provide that protection on hollow ellipse metal profiles.

Floor protection on ellipse profiles

An open ellipse tube end puts a sharp metal edge on the floor that follows a continuously changing curve, tightest at the pointed ends and gentlest at the wide center. This geometry concentrates floor contact at the pointed ends, which dig into finished surfaces. Ellipse tube plugs cover the entire ellipse opening with a smooth PE head. Unlike leaving metal edges unprotected, the plug distributes weight evenly across the full ellipse area.

Tube sealing and moisture protection

An open ellipse tube collects moisture, debris, and insects. On steel tubing, trapped moisture causes internal corrosion that weakens the frame. Ellipse tube plugs seal the entire ellipse opening. The flexible walls conform to the full curve, including the tight radii at the pointed ends where sealing is most challenging. No gaps at any point along the perimeter. Plugs for ellipse furniture legs that seal the full cross-section.

Noise dampening

Hollow ellipse tubes resonate and amplify contact noise. The varying curve produces a complex metallic ring when the tube contacts smooth, hard floors. The pointed ends act as natural stress concentrators that amplify vibration. Ellipse tube plugs fill the opening with PE, absorbing the vibration across the full ellipse interior. In restaurants, offices, and schools where ellipse-legged chairs move constantly, sealed ends reduce noise.

Finished appearance

ellipse tubing is chosen for its distinctive visual profile: sleeker and more dynamic than standard oval or round. An open tube end undermines that design by exposing the hollow interior. Ellipse tube plugs cover the opening with a clean PE head that follows the ellipse contour exactly, including the tapered endpoints. The finished end reads as intentional, maintaining the tube’s design-forward aesthetic. ellipse tubing plugs PE that complete the design.

Materials and Construction

Same PE (polyethylene) used across the standard tube plug range. Ellipse tube plugs are molded from a single piece of PE with no joints, seams, or separate components. The ellipse profile requires continuously varying curvature that transitions from a tight radius at the pointed ends to a gentle radius at the wide center.

Flat PE Head Floor contact surface

The head covers the full ellipse cross-section with a continuously varying perimeter curve. The PE surface provides low-friction floor contact on smooth, hard floors. The flat profile sits flush with the tube end for a clean, unobtrusive finish.

  • Full-coverage ellipse head: continuous curve with tapered endpoints
  • Black and white on both sizes
  • UV resistant, moisture resistant, impact resistant
  • Smooth, molded surface with no seam lines along the curve
Flexible Internal Walls Grip mechanism

The internal walls follow the ellipse contour. The curvature varies from tight at the pointed ends to gentle at the wide center. The walls must flex differently at each point along the perimeter to maintain even contact throughout the ellipse. This variable-radius grip is what distinguishes these plugs from oval tube plugs at the engineering level.

  • Variable-radius grip: adapts to continuously changing curvature
  • Tight contact at the pointed ends where sealing is most critical
  • Continuous perimeter contact with no gaps
  • Friction fit holds under vibration, movement, and load
  • No adhesive required

Ellipse Tube Plugs vs. Other Shapes

If your furniture has ellipse tubing, only ellipse-specific plugs fit correctly. Here is why other shapes do not work.

vs. Oval Tube Plugs

Oval tube plugs have a rounder profile with blunt ends. At the wide center of the curve, an oval plug and an ellipse plug may look similar. But at the endpoints, they diverge: the oval plug is too round for the pointed ellipse ends, creating gaps at exactly the points where sealing matters most. Always match the end profile: rounded ends = oval, pointed ends = ellipse.

vs. Round Tube Plugs

Round tube plugs are circular and cannot fit an ellipse opening. The difference in axes means a round plug either gaps on the long axis or cannot enter on the short axis. No circular plug works on a non-circular tube.

vs. Rectangular Tube Plugs

Rectangular tube plugs have flat sides and squared corners. An ellipse tube has no flat sides and no corners. The rectangular plug cannot conform to any part of the ellipse curve.

vs. Half-Oval Tube Plugs

Half-oval tube plugs fit D-shaped tubes with one flat side and one curved side. An ellipse tube has no flat side. The half-oval plug cannot enter an ellipse tube because its flat geometry has no corresponding surface inside the tube.

Floor Compatibility

The flat PE head of ellipse tube plugs provides basic floor protection on smooth, hard floors and carpet. Not recommended for rough hard floors like textured tile or stamped concrete, where the PE material wears quickly. PE is smoother and softer than bare metal, adequate for most surfaces without scratching. The ellipse head distributes weight across the full area rather than concentrating it at the sharp pointed metal ends.

On scratch-sensitive floors like engineered hardwood or luxury vinyl, apply a round self-adhesive furniture pad to the plug head for dedicated PA6 protection. Choose a round pad size that covers the ellipse head as completely as possible. On rough hard surfaces like textured tile or stamped concrete, furniture slides with ABS surfaces handle the texture better than PE.

Where Ellipse Tube Plugs Work Best

Ellipse tube plugs are designed for any hollow ellipse furniture tube that needs a finished, sealed, protected endpoint. ellipse tubing is a design-forward profile choice found in furniture where a sleeker, more dynamic look than standard oval or round is desired.

Ideal applications
  • Dining chairs and side chairs with ellipse tube legs (20 × 40 mm is the most common)
  • Bar stools and counter stools with ellipse frames
  • Commercial and restaurant seating with ellipse tubing for a contemporary look
  • Display fixtures and retail furniture with ellipse structural tubing
  • Design-forward residential furniture where the sleek ellipse profile is a deliberate aesthetic choice
  • Any 15 × 30 or 20 × 40 mm hollow ellipse tube end that is open and needs finishing
Not ideal for

All Tube Plug Shapes

Match the plug shape to your tube shape. Every shape uses the same PE construction and press-fit concept.

Round

26+ sizes, Ø 10 to 80 mm. 7 head styles.

Square

13 × 13 to 100 × 100 mm.

Rectangular

10 × 30 to 60 × 120 mm.

Oval

Rounded, blunt ends.

Ellipse ← You are here.

15 × 30 and 20 × 40 mm. Pointed ends. Black, white.

Half-Oval

D-shaped. One flat, one curved.

Where People Use These Plugs

Anywhere hollow ellipse tubing has open ends that need finishing, sealing, and floor protection. Ellipse tube plugs are the only plugs in the range that match the pointed-end ellipse cross-section.

Residential furniture

Dining chairs, side chairs, accent chairs, and bar stools with ellipse tube legs. The 20 × 40 mm size covers the majority of residential ellipse-legged seating. Ellipse tube plugs protect hardwood, tile, laminate, and vinyl from the sharp pointed metal ends of bare ellipse tubing. For additional PA6 floor protection, apply self-adhesive furniture pads to the plug head.

Commercial and design

Restaurant seating, hotel furniture, showroom displays, and retail fixtures where ellipse tubing is chosen for its contemporary aesthetic. The sleek, pointed profile signals modern design intent, and these plugs finish each tube end in a way that maintains that visual language. In hospitality environments, the ellipse profile is popular because it looks refined while providing the same structural strength as standard round or rectangular tubing. Available in bulk for manufacturing runs. For commercial pricing, visit Business Solutions. On floors that see heavy commercial cleaning, the PE head resists degradation from cleaning chemicals. For floor-contact legs that also need dedicated PA6 protection, pair these plugs with self-adhesive furniture pads applied to the plug head.

Maintenance and Inspection

These plugs require the same minimal maintenance as any standard tube plug. Check periodically that the plug remains seated flush with the tube edge around the entire ellipse perimeter. Pay particular attention to the pointed ends, which are the thinnest part of both the plug and the tube and the most susceptible to impact damage.

On commercial furniture that moves frequently, inspect every 3 to 6 months. On residential furniture, an annual check is enough. The PE surface does not stain, discolor, or absorb cleaning products. Ellipse tube plugs are sold in packs of 4, so keeping spares on hand is practical and convenient. If a plug becomes loose or the pointed ends show damage, replace it. The PE body flexes rather than cracks, so wear shows as loosened grip rather than visible breakage. The pointed ends are the most vulnerable to impact, so check them first when inspecting.

Related Products

Similar curved profiles

Oval Tube Plugs: for fully oval tubes with rounded, blunt ends.

Half-Oval Tube Plugs: for D-shaped tubes (one flat side).

Floor protection

Round Self-Adhesive Furniture Pads: apply to any plug head for PA6 scratch protection.

Round Self-Adhesive Furniture Glides: PA6 on ABS for glide performance.

Specifications

Specification Details
Product Type
Tube Plug – Inner with Ribs (H3/Flat Head)
Shape
Ellipse Tube
Materials
PE (Polyethylene)
Fit Style
Ribbed friction-fit compression
Floor Compatibility
All hard and soft floors
Furniture Compatibility
Furniture legs, shelving, railings, office fixtures
Leg Compatibility
Metal and plastic ellipse tubing
Sizes Available
15×30 mm (1.5–2 mm wall), 20×40 mm (1–2 mm wall)
Color Options
Black, White
Installation Type
Press-fit by hand or rubber mallet
Key Benefits
Flat finish, secure fit, impact resistance, easy installation
Indoor/Outdoor Use
Indoor | Covered Outdoor | Uncovered Outdoor
Recyclable
Yes

Size Chart

Tube Dimensions (W x L) Tube Wall Thickness (T) Head Height (H1) Insert Depth (H)
15 x 30 mm (0.59" x 1.18")
1.5 – 2 mm (0.06" – 0.08")
5 mm (0.20")
12 mm (0.47")
20 x 40 mm (0.78" x 1.578")
1 – 2 mm (0.04" – 0.08")
5 mm (0.20")
12 mm (0.47")

Frequently Asked Questions

What is the difference between ellipse and oval tube plugs?

Oval tubes have a rounder, more uniform curve with blunt ends. Ellipse tubes have a more elongated profile with pointed or tapered ends. The two shapes are similar but not interchangeable. An oval plug will gap at the pointed ends of an ellipse tube. An ellipse plug will bind at the blunt ends of an oval tube. Measure your tube and compare the profile to both shapes. If the ends are pointed or tapered, use ellipse tube plugs. If the ends are rounded and blunt, use oval tube plugs.

How do I measure an ellipse tube?

Measure the short axis (width) and the long axis (length) of the ellipse opening in millimeters, outside edge to outside edge. Then measure the wall thickness with calipers. You need all three measurements. The two available sizes are 15 × 30 and 20 × 40 mm. Always list the shorter dimension first.

Can I use a round plug in an ellipse tube?

No. A round plug is circular and cannot match the two different radii and pointed ends of an ellipse cross-section. The round plug will not enter the tube at all if sized to the long axis, or it will leave large gaps if sized to the short axis. Shape must match shape.

Why are only two sizes available?

ellipse tubing is less common than round, square, or rectangular profiles in furniture manufacturing. The 15 × 30 and 20 × 40 mm sizes cover the most frequently used ellipse tubing specifications. For other ellipse sizes, contact Business Solutions for custom production.

Are these the same material as oval tube plugs?

Yes. Same PE (polyethylene) construction with flexible internal walls. Same press-fit installation. Same chemical, UV, and moisture resistance. Only the cross-section geometry differs. Ellipse tube plugs have the pointed-end profile that matches ellipse tubing specifically.

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