FORMUFIT F114CP7-WH-4 PVC Caster Pipe Cap, Furniture Grade, 1-1/4" Size, White (Pack of 4) Fits 1-1/4" Size Schedule 40 PVC Pipe, which has an outside diameter of 1-5/8" (1.660") Superior, glossy white surface finish for a Professional appearance UV Stabilized for outdoor color retention Accepts threaded casters, or can accept a 3/8" rod for axles.