Maintenance-Free High-Performance Friction-Ring Stem Caster Swivel Caster 220 lb Load Rating 0 to 299 lb 5 in Wheel Dia 1 1/4 in Wheel Width Polyolefin Wheel/Tread Material 6 7/8 in Mounting Height Precision Ball 7/16 in x 1-7/16 in Caster Stem Size Friction Ring Nylon Caster Frame Material No Finish Frame Finish Yes Non-Marking 1 Number of Wheels