Industrial wire shelving supports up to 1,000 lb, evenly distributed per shelf, Each shelf adjusts in 1" increments, Shelving is made of steel with a powder-coat finish, 10-gauge shelf surface, 3-gauge frame, and 6-gauge wave pattern, Easy collar-and-sleeve assembly requires no tools, Units can be expanded with use of add-on units and extra shelves, Starter unit includes four shelves and four posts, Add-on unit (sold separately) includes four shelves and two posts, SKU: SPRCH24340