... .The salt spray is over 72hours And make Brake Hose Pipe Fittings according to your samples, & drawings; The raw material ... is usually steel 20, coated yellow Zinc. CommodityBrake Hose Pipe FittingsMaterialMild steel, stainless steel, aluminum, copperThread standardsMetric: M10X1, M10X1 ... ; casting,OtherMetal accessories, rubber accessories, plastic accessories Brake Hose Pipe End Fittings