Friction-Ring Stem Caster for Furniture Office Equipment Swivel Caster 75 lb Load Rating 0 to 299 lb 2 1/2 in Wheel Dia 7/8 in Wheel Width Rubber Wheel/Tread Material 3 3/32 in Mounting Height Plain 3/8 in x 1 in Caster Stem Size Friction Ring Steel Caster Frame Material Nickel Plated Frame Finish No Non-Marking 1 Number of Wheels