Maintenance-Free High-Performance Friction-Ring Stem Caster, Swivel Caster with Total Lock, 165 lb Load Rating, 0 to 299 lb, 3 in Wheel Dia., 1 1/4 in Wheel Width, Thermoplastic Rubber Wheel/Tread Material, 4 7/8 in Mounting Height, Precision Ball, 7/16 in x 7/8 in Caster Stem Size, Friction Ring, Glass Filled Nylon Caster Frame Material, No Finish Frame Finish, Yes Non-Marking, 1 Number of Wheels