This industrial wire shelving from Lorell is made of heavy-duty steel with a chrome powder-coated finish. It supports up to 1,000 lb per shelf when evenly distributed. Shelving has a 10-gauge shelf surface, 3-gauge frame, and 6-gauge wave pattern. Each shelf adjusts in 1in increments for the perfect fit. Units can be expanded with the use of add-on units and extra shelves. (sold separately.) Easy collar-and-sleeve assembly. No tools are required! Starter unit includes 4 shelves and 4 posts.