Stem Swivel Caster for Shelving Swivel Caster with Brake 300 lb Load Rating 300 to 999 lb 5 in Wheel Dia 1 3/8 in Wheel Width Polyolefin Wheel/Tread Material 6 in Mounting Height Plain 1 in x 2 in Caster Stem Size Friction Ring Aluminum Caster Frame Material Zinc Plated Frame Finish Yes Non-Marking 1 Number of Wheels