The Grainger 4-Shelf Steel Boltless Shelving Kit has a 620 lb weight capacity per shelf. It is made of steel with a gray epoxy finish and measures 48"W x 18"D x 74"H. The kit includes 4 shelves, 4 posts, 16 footplates, and all necessary hardware. Shelves are adjustable in 1" increments. This commercial-grade boltless shelving provides sturdy storage with no nuts or bolts required for assembly.