The Poly-Z-Brite™ finish is added to the Posts on this solid plastic shelving. This shelving is used for freezers and other wet, cold environments. Sturdy steel frame supports up to 300 lbs. per shelf and the steel frames Poly-Z-Brite™ finish includes a 15 Year Limited Warranty against rust and corrosion. It also handles extreme moisture and temperature fluctuation. The ultra durable Poly-Z-Brite powder-epoxy over zinc-chromate electroplating finish on this plastic shelving unit resembles chrome. This Plastic Shelving is easy to clean and includes a raised edge to prevent spills. Each shelf adjusts at 1 increments on numbered posts for accurate alignment. Includes 4 upright posts and 4 shelves. Easy tool-free assembly. Add casters to convert to a mobile storage unit. Choose casters, 4 casters with 2 locking casters or 4 fully pneumatic casters.