Single Rivet beam high-density shelving is designed for maximum vertical clearance between shelves. Side and back sway braces are not necessary for stability as they are in the Open Clip Type Metal Shelving, meaning all sides are open for easy item retrieval. Add-on units assemble quickly without special tools by using a common tee post between units. Finished in Light Putty baked enamel. All sections are equipped with 6 shelves and come with 5/8" particle board. Shelves adjust on 1-1/2" centers.