Shepherd General Duty Caster, 2-1/2" Hard Rubber Wheel, Swivel Plate Mount, with Brake Capacity: 175 lbs Top Plate Size: 2-3/4" x 3-13/16", Bolt Holes at 1-3/4" x 3", Bolt Size 5/16" Wheel: 2-1/2" Hard Rubber Bearing: Plain Overall Height: 3-1/4"