NSF-Listed Sanitary Friction-Ring Stem Caster Swivel Caster 250 lb Load Rating 0 to 299 lb 3 1/2 in Wheel Dia 1 1/4 in Wheel Width Polyolefin Wheel/Tread Material 4 9/16 in Mounting Height Delrin 7/16 in x 1-7/8 in Caster Stem Size Friction Ring Steel Caster Frame Material Zinc Plated Frame Finish Yes Non-Marking 1 Number of Wheels