If rust can be a potential problem, the Colson 4 Series stainless steel casters are your solution, handling working loads of up to 1,250 lbs. per caster. Look to the Colson 4 Series Stainless Steel casters for an ideal industrial 2″-wide solution when exposure to water or chemicals are required. Polished 304 grade stainless steel construction handles the most punishing and corrosive environments. All component parts in this caster – including spanner bushing, axle and nut, and raceway bearings – are stainless steel. Hollow axles with grease fittings along with grease zerk on swivel raceways allow for easy maintenance of each caster.