Quiet-Roll Expanding Stem Caster Swivel Caster with Brake 250 lb Load Rating 0 to 299 lb 3 in Wheel Dia 1 1/4 in Wheel Width Polyurethane Wheel/Tread Material 4 1/4 in Mounting Height Precision Ball 1-37/64 in x 2-37/64 in Caster Stem Size Expanding Adapter Steel Caster Frame Material Zinc Plated Frame Finish Yes Non-Marking 1 Number of Wheels