Work Table Expanding Stem Caster 4 in. Wheel with Brake New (4 Wheels Included) Stem Size: 1-5/8 in. Comes with brake 4 wheels included 4 in. black rubber wheel Holds 250 lbs per caster Adjusts to fit into 1 3/8 in. to 1 3/4 in. openings Compatible with most work tables and equipment stands. Raises equipment or tables by 5 in. and creates mobility Weight capacity of 1,200 lb.; 300 lb. capacity per single caster. Durable enough for heavy-duty use 2 with brakes, 2 without brakes.