... productive factory, we are always at your service.Stainless steel precision tube refers to the tubes which have high ... 631,17-4ph,17-7 ph, S31803904L,etcDuplex stainless steel: (S22053,S25073,S22253,S31803,S32205,S32304;2205,2507)Special ... acid, fertilizer and more production device/equipment, photographic industry, rope, CD rod, bolt,nut, environmental production and building areaPacking: ...