Friction-Ring Stem Caster Kit Swivel Caster 440 lb Load Rating 300 to 999 lb 2 in Wheel Dia 1/2 in Wheel Width Nylon Wheel/Tread Material 2 7/16 in Mounting Height Plain 7/16 in x 7/8 in Caster Stem Size Friction Ring Nylon Caster Frame Material No Finish Frame Finish Yes Non-Marking 2 Number of Wheels Package Quantity 4