UNIT INCLUDES 3 LEVELS, ADJUSTABLE AT 1-1/2" INCREMENTS. UPRIGHTS ARE A SUBSTANTIAL 1-1/2" X 1-1/2" X 14 GAUGE STEEL. Per Level, Gray BOLTLESS WIDE SPAN STORAGE RACK WITHOUT DECKING PROVIDES EXTRA SPACE FOR BULKY MATERIALS. HEAVY-DUTY ROLL-FORMED STEEL FRAMING WITH CHIP RESISTANT GRAY BAKED ENAMEL FINISH.