If rust is a problem, Colson 2 Series stainless steel casters are the solution, handling working loads of up to 325 lbs. per caster. Look to the Colson 2 Series Stainless Steel casters for an ideal industrial 1-1/4″-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. If you need more capacity or a wider wheel footprint for stability, step up to the Colson 4 Series Stainless for capacities of up to 1,250 lbs. per caster and 2” wide wheel treads.