Panco® Aluminum Racks with Side Panels have 1 1⁄2″ slide spacing to accommodate (40) 18″ x 26″ full size sheet pans. Furnished with 5″-diameter casters. Unit shipped knocked down. Standard Model (ORO-1840) is constructed of 1″ square tubular aluminum frame and supports, with each frame and cross support junction joined with a two-piece aluminum gusset riveted to frame. Heavy Duty Model (OR-1840) is constructed of 1″ square tubular frame and support with 0.100″-thick aluminum die-formed top and bottom, with vinyl bumper around the top.