Amazon.com: (Pack of 10) 1.375" (1-3/8"), 10-14 Ga Square Plastic Plugs | Tubing End Cap, Furniture Glide Inserts | Fencing Post End Caps | by SBD : Industrial & Scientific
Arched Square Tube Plug 19 20 22 25 30mm Plastic End Cover Blanking Tube Cap Ball Head Surface Round Shape Chair Beach Bed - Furniture Accessories - AliExpress
Amazon.com: (Pack of 10) 1.375" (1-3/8"), 10-14 Ga Square Plastic Plugs | Tubing End Cap, Furniture Glide Inserts | Fencing Post End Caps | by SBD : Industrial & Scientific
Amazon.com: OGC (4 Pack) - 2 3/8 Inch Square Tubing for Plastic Plug Cap Cover Tube Durable Chair Glide Insert Finishing Plugs : Industrial & Scientific
1 inch Square Tube Unistrut end caps, Suitable for Frame Hole Tube Plugs, Chair Leg Inserts, Glide Protection for Furniture and Floor by Prescott Plastics – Pack of 20 - - Amazon.com
Square End Caps Blanking Plugs Pipe Tube Inserts With M8 Thread Adjustable Feet | eBay
Furniture Accessories Durable Chair Glide Floor Protector Black Rectangle Square Chair Leg Tube Pipe Plugs Tube End Cap Plastic Tube Insert Push in Feet End - China Tube Insert and Tube Plugs
Square Plastic Insert Plugs | Plastic Blanking End Cap | Square Tube Cap Plastic - Furniture Accessories - Aliexpress
25/40/50mm Black Blanking End Cap Square Tube Insert Bungs Pipe Box Chair Plug Home Furniture Feet Business Office Fasteners - Ball Joints - AliExpress
Square Plastic Insert Cap Tube | Plastic Blanking End Cap Caps - 2/4/10pcs Plastic - Aliexpress
2-16pcs Pe Plastic Black Square Tube Plug 10x10mm~100x100mm Blanking End Caps Tube Pipe Inserts Bung Chair Feet - Furniture Accessories - AliExpress
Amazon.com: Prescott Plastics 3” (76.2 mm) Square Plastic Hole Plugs, Insert, Black End Caps for Metal Tubing, Fences, Glide Protection for Chair Legs and Furnitures (4 Pack) : Industrial & Scientific
Amazon.com: Prescott Plastics Made in USA 0.875 Inch Square Plastic Plug Insert, Black End Cap for Metal Tubing, Fence, Glide Insert for Pipe Post, Chairs and Furniture (10 Pack) : Industrial & Scientific
25/40/50mm Black Blanking End Cap Square Tube Insert Bungs Pipe Box Chair Plug Home Furniture Feet Business Office Fasteners - Ball Joints - AliExpress
Square Plastic Black Blanking End Cap Tube Pipe Insert Plug Bung 10x10~100x100mm | eBay