Versatile TENNSCO Closed Industrial Shelving offers strength and durability to store all your industrial supplies. Enclosed sides and back keep equipment and supplies from falling off. Starter units can be used individually or combined with add-on units to complete a row of shelving. 22-gauge shelves are fully welded and lapped in two places for extra strength. Shelves are supported by 13-gauge compression clips instead of bolts and adjust in 1" increments and are 1"H to accomodate most label holders. Upright posts feature a square hole every third hole for easy shelf alignment.