This Camshelving Elements Series is made from a composite material which is as strong as steel but much more light weight, up to 60% lighter. This series is easy to set up and adjust or change configurations. This Camshelving unit has 4 shelves and can be added on to, additional unit sold separately. Shelf plates have Camguard antimicrobial protection that is permanently embedded. This Camshelving is offered with lifetime warranty against corrosion and rust.