|  | diameter specification:4mm-12.7mm(5/16''--1/2'') surface coating: Zn-coating, Copper-coating, Zn-aluminium alloy, copper-nickel alloy, PVF coating, PA11/PA12 coating product type: engine connection tube、booster steering tube apply to: kinds of Automobile Raw materials : single/double wall welding tube, stainless steel tube, seamless steel pipe tube Speciation : φ4.76mm-φ12mm; thickness : 0.5mm-1.2mm Surface coating of tube : copper, Zinc, PVF coating, Nylon(PA11,PA12) COATING |