... , 2.Surface treatment: polish, plating, 3.custom stainless steel precision casting tube 1.Aluminum, zinc, steel, brass, 2.Surface treatment: polish, ... Aluminum alloy,etc 2.Process Aluminum casting, sand casting, die casting, gravity casting, high pressure die casting, low pressure die casting. 3.CertificateISO9001:2000 and ISO ... we will answer you within 24 hours stainless steel precision casting tube