This set of height adjustable plate casters features 3" swivel casters with brakes. The heavy duty steel top plate is 3-1/2" x 3-1/2" and has inner holes on 1-3/4" centers and outer holes on 2-7/8" centers for installing the casters with bolts or screws to equipment, carts, or furniture, and they fit most manufacturers' kitchen equipment. The height adjusts between 8-1/2" and 10-1/2" to help you level your equipment and make allowances for uneven floors. The 3" casters have grease-resistant polypropylene wheels with locking side brakes and have a load capacity of 220 Lbs. per caster. They operate in a temperature range of 14ºF to 212ºF. The set of four 3" adjustable top plate casters weighs 13 Lbs.