ClosetMaid Large and Small Closet Pole End Caps for Wire Shelving (14-Pack) 71016 - The Home Depot
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 - - Amazon.com
Hammer Axle End Caps – Saris
STITCHED CAPS – FINAL RISE GEAR
ERA 4 Inch Schedule 40 PVC End Cap, Socket - - Amazon.com
Pipe End Caps manufacturer in Carbon/ Alloy/ Stainless Steel