... various specifications, models, can suitable for any space requirements. Steel wire rack with castors that is mobile.1 Material:Carbon Steel2 Surface ... :355*609*10004 Best price. Metal shelving racks include four steel poles, usually consisting of 3 to 6 feet in height ... , unless you are going to buy a utility cart. With shelves that are 18, 24, 30,36, 42, 48, 60 ...