Amazon.com: Plastic Plugs Tubing End Caps Chair End Caps Furnigear 3/4” Outside Bottom Round Tubing Caps Black Furniture Sliders Glides (40pack) : Industrial & Scientific
25 Mm Ball Head Round Plug Tube Insert Ends Hollow Blank Tube Arched Cap Cover Pole Ending Pile Protector Decoration Furniture - Gaskets - AliExpress
10 Pack of 1.5" Round Tubing Plastic Black Hole Plug End Cap, 1.5 inch OD Tube Pipe Cover Plug, Heavy Duty Plastic Plug Cap Insert, Durable Chair Glide - Walmart.com
10 Pack of 1.5" Round Tubing Plastic Black Hole Plug End Cap, 1.5 inch OD Tube Pipe Cover Plug, Heavy Duty Plastic Plug Cap Insert, Durable Chair Glide - Walmart.com
20x20 Mm Square Tube Plug Plastic End Cover For Blanking Tube Cap. Pad Arched Ball Head Surface Round Shape Chair Beach Bed - Furniture Accessories - AliExpress
Amazon.com: Prescott Plastics 1" Inch (25.4 mm) Round Plastic Hole Plugs, Inserts, Black End Caps for Metal Tubing, Hardware Plugs, Fences, Glide Protection from Chair Legs and Furniture - Pack of 10 :
OGC (10 Pack) - 7/8 Inch OD Round Black for Plastic Plug by Cap Cover Tube Durable Chair Glide Insert Finishing Plugs - - Amazon.com
CHERNE 4 in. Rubber Test-Ball Pipe Plug 270040 - The Home Depot
10 Pack of 1.5" Round Tubing Plastic Black Hole Plug End Cap, 1.5 inch OD Tube Pipe Cover Plug, Heavy Duty Plastic Plug Cap Insert, Durable Chair Glide - Walmart.com