Static Racks 7 sets, Quikpik® Gravity Flow Racks 96" High. Carton flow levels feature notched side rails that allow adjustable front-to-back placement on uprights. Each level includes 4 hanging clips for easy height adjustments. Beams on these assembly flow racks feature a smooth front that accepts sticker labels for identification. Rollatraks are made with 22 gauge inverted channel steel and include ¾? dia. rollers on 1 ½? centers. 22 gauge roll-formed steel guide rails adjust at ½? increments for lane adjustments.