4 PC 4" Swivel Caster set with two wheels with Brakes SIZE: 4" X 1 1/4" WHEEL Features: Thread Guards Includes: 4 Swivel Caster, (Two with Brakes) Tire & Wheel Specs: Non-Marking Polyurethane Wheels Ball Bearing Hubs Overall Height: 5 1/4" overall height Bolt Pattern: 1 3/4" x 2 7/8" Mounting Bracket size: 2 1/2" x 3 5/8" 300 lbs. capacity per wheel Ideal for various use & place, wear-resisting & Quiet