Cambro Camshelving Stationary Starter Unit with 4 Vented Shelf, 48 x 64 x 21 inch -- 1 each.For use in kitchens, freezers, coolers, pantries or dry storage. Designed to share posts, simplifying assembly and maximizing storage space. Best for storing perishable products that benefit from air flow around them. Includes 2 posts, post connectors, traverses and vented shelf plates. Made of smooth polypropylene. Wipes clean. Rust proof. Traverses and posts are weight bearing with solid, steel cores.