Front-loading and side-loading models available. Constructed of 1″ square tubular aluminum frame and supports. 1 1⁄8″ x 1 5⁄8″ extruded aluminum tray slides with two raised beads to minimize friction. Slides are welded to vertical posts. Slide spacing to be 5″, 3″, or 2″ to accommodate (10, 12, 20, or 30) full size sheet pans. Furnished with 5″-diameter casters. Shipped assembled. #OUR-1810-3/W rack is 38″ tall and features stainless steel top. All others are full height and feature open top.