Hallowell DuraTough all-welded storage and combination cabinets are available in Heavy-Duty and Extra Heavy-Duty models for both our Classic and Galvanite corrosioin resistant series. Classic Series cabinets are fabricated from prime grade cold rolled sheet steel. Galvanite Series cabinets are fabricated from galvannealed sheets steel which as a zinc-iron alloy coating that is applied at the mill providing protection against high-humidity and moist environments. Heavy Duty Cabinets are fabricated with 16 gauge sheet steel and are fully-welded creating a rigid, durable unit. Extra Heavy-Duty Cabinets are fabricated with 14 gauge sheet steel which is 25% thicker than 16 gauge providing MAXIMUM durability.