Twin-Wheel Threaded Stem Caster Swivel Caster with Total Lock 220 lb Load Rating 0 to 299 lb 3 15/16 in Wheel Dia 2 3/4 in Wheel Width Polyurethane Wheel/Tread Material 5 1/8 in Mounting Height Precision Ball 15/32 in x 63/64 in Caster Stem Size Threaded Nylon Caster Frame Material No Finish Frame Finish Yes Non-Marking 2 Number of Wheels