Cold rolled steel, we have many sizes and different thicknesses, our most standard is 12x12x78'', and 1.5mm for door/frame for single and double tier, and 0.6mm for body, can custom make what customer requires.
Knock down, all welded, riveted. 12, 15, 18 width and depth. 66 and 78 for height, option for 6 inch legs.