Material:Mild steel,stainless steel Size:Standard or OEM. Packing:Naked ISO 9001:2000 certificate. Fast delivery,7-30 days 1.) Processing technic: ... pier, ditch lid, manhole cover, ladders, fences, guardrail etc. 4.)Material: Carbon steel, Stainless steel , and so on .5.)Surface treatment ... :Naked or packing as the customers' request grating stair tread(ISO 9001:2000 supplier)