Shepherd Regent Series Caster, 4" Gray Rubber Wheel with 7/16" x 1-7/16" Grip Ring Stem, with Brake Capacity: 125 lbs Mounting: Grip Ring Stem - 7/16" Diameter x 1-7/16" High Wheel: 4" x 15/16" Gray Thermoplastic Rubber Mounting Height: 4-3/4" Finish: Zinc Plated