E.R. Wagner CSRT-F133-01 5" Diameter TPR Rubber Donut Tread/Polyolefin Hub Wheel Medium Duty Swivel Plate Caster, 250 lbs Capacity Range Precision Ball Wheel Bearing Mounting Dimensions 1 3/4" x 2 11/16" to 3" Overall Height 6 1/4" Load Rating 250 LBS Caster Finish Zinc