Two extra shelves are designed to expand Lorell Industrial Wire Shelving Starter Kits (sold separately) and organize your storage areas. Easy collar-and-sleeve assembly requires no tools. Each shelf supports up to 1,000 lb. evenly distributed and adjusts in 1" increments. Shelving is made of steel with a chrome powder-coat finish, 10-gauge shelf surface, 3-gauge frame and 6-gauge wave pattern.