E.R. Wagner CSTR-B021-01 3" Diameter Soft Rubber Wheel Light Duty Swivel Stem Caster, 7/16" Diameter X 1-29/32" Length Friction Ring Stem, 100 lbs Capacity Range Delrin Wheel Bearing Mounting Dimensions Friction Ring Stem 7/16" x 1 29/32" Overall Height 3 3/4" Load Rating 100 LBS Caster Finish Zinc