Safco Products 5291BL Industrial Wire Shelving Starter Unit 48"W x 18"D x 72"H (Add-On Unit and Extra Shelf Pack sold separately), Black Industrial wire shelving starter unit 48"W x 18"D x 72"H Starter unit includes four shelves, four posts and snap-together clips Rated up to 1000 lbs. per shelf evenly distributed, overall capacity 2500 lbs. evenly distributed, shelves adjust in 1" increments Steel construction with durable powder coat finish Use with Safco Products Add-On Unit 5292BL includes four shelves, two posts, Extra Shelf Pack of 2 shelves 5293BL and optional Casters Model 5283, sold separately