4" Heavy Duty Semi Steel Cast Iron Swivel Casters - 4,000 lb Capacity
CasterHQ Brand Semi-Steel Gray Iron Swivel Casters Set of 4 Casters. Swivel Casters feature heat-treated raceways, zinc plated steel to prevent rust, and double ball raceways to provide a smooth long-lasting ergonomic turning ability. Wheels, Raceway Seals, and axles all come with grease fittings.