(Pack of 8) 1-1/2" Round (14 - 20 Ga --1.34" to 1.43" ID) Plastic Tubing Plug 1.5 Inch End Cap - Steel Furniture Pipe Tube - Chair Leg - Table Glide Insert | End Caps for Fitness Eqpt. For Fencing Posts, Furniture End Caps, Fitness Equipment End Caps Flexible ridges snugly hold these plugs in place. For Unthreaded Surface Type with Stright Profile Maximum Temperature 150 ' F.