2-1/2" Heavy Duty Car Dolly Replacement Casters Set of 4 - 2500 Lbs. Combined Capacity2 1 2" Heavy Duty Car Dolly Replacement Casters Set of 4 Part #: M350005 4 Plastic caster wheels are solid injected molded polyolefin which yields a high shock load, impact resistant, and abrasion resistant wheel. These wheels are lightweight yet hold high weight capacities and are also non marking. They also are washable, impervious to water, and highly resistant to solvents, oils, grease, most chemicals, and cleaning solutions. These wheels do not