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Plastic 1/2 x 1-1/2 inch Black Rectangle Tubing Cap, Finishing Plug, Pipe Tubing End Cap, Durable Chair Glide Universal - 20 - Walmart.com
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Amazon.com: (Set of 8) 2"x 4"OD Rectangular Tube Plug, Non-Slip Plastic Tubing End Cap, Furniture Chair Leg Caps, Chair Insert Glides|Finishing Plug for Chair Table Stool Leg Fence Post Pipe(Black,50x100 mm :
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Personal Custom Rectangular Plastic Tube Plastic Tubing - China Soft and Hard Co-Extrusion, Double-Color Coextrusion | Made-in-China.com
![Source Rectangular plastic extrusion rectangular PVC Pipe with square pvc pipe sizes on m.alibaba.com Source Rectangular plastic extrusion rectangular PVC Pipe with square pvc pipe sizes on m.alibaba.com](https://sc04.alicdn.com/kf/HTB1_CXHl_nI8KJjSszgq6A8ApXaS.jpg)
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Amazon.com: Prescott Plastics 1.5 x 3 Inch Rectangle Plastic Plug Insert (4 Pack), Black End Cap for Metal Tubing, Fence, Glide Insert for Pipe Post, Chairs and Furniture : Industrial & Scientific
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Friedrich and Dimmock Glass Borosilicate Large Ratio Rectangular Tubing - Friedrich and Dimmock Glass
![FRP Rectangular Tube, (IPE) Isophthalic Polyester Non-Flame Retardant, 4" x 2", 1/8" x 1/4" Wall Thickness, Olive Green - Harrington Industrial Plastics FRP Rectangular Tube, (IPE) Isophthalic Polyester Non-Flame Retardant, 4" x 2", 1/8" x 1/4" Wall Thickness, Olive Green - Harrington Industrial Plastics](https://store.hipco.com/images/RectTubeGreen.png)