Square Plastic End Caps for Box / Hollow Sections & Profiles
Lamellar plugs End caps for square pipe 30X30 mm 5 pcs. Black RAL 9005 Plastic End Caps 3x3 cm EMFA ® : Amazon.co.uk: DIY & Tools
1.5 inch Square Tubing Black Plastic Plug,1.5 Inch End Cap 1.5"x1.5" 1.5x1.5 Fence Post Pipe Cover Tube Chair Glide Insert Finishing Plug,20 Pieces : Amazon.co.uk: DIY & Tools
Square Black Plastic End Cap For Profile Rod Insert Plug - Moderix
2 Inch Square Plastic Plug, End Caps for Tubing Pipe OD 2" x 2" (not ID),
19mm Square Ribbed Push In Tube Inserts For All Tubular Legs
Square Plastic Hole Plugs, 2X2 Square Tubing Inserts, Black End Caps for Metal Tubing, Fences, Glide Protection From Chair Legs and Furniture - China Pipe Caps, Pipe End Caps | Made-in-China.com