... T700-1988 standard ) 5.features:by degrease phosphorization, polished finish,ultra-violet,colorfull,non-faded ,and surface coating use ployester ... resin finish .anti-skidding safety. 6.welded steel use argon arc ... -violet , non-faded ,smooth , non-toxic and non pollution , un-stimulating ,anti-static , 3.stainless steel ,other parts use kirsite ...