Service Caster #20 Series 1 inch expanding stem swivel casters with 3-1/2 inch black polyurethane wheel. Featuring a zinc plated finish, these casters are ideal for work tables, shop projects, and any equipment with round or square tube legs.
Wheels roll smoothly with integrated ball bearing design. The polyurethane wheel performs well on most surfaces, and excels on hard surfaces like concrete, tile, and wood. They will not mark or mar floor surfaces.
Mounting Height: 4-5/8"
Expanding Adapter Size (Inside Diameter): 1"
Wheel Size: 3-1/2" x 1-1/4"
300 pound capacity per caster