Quick connector, QC-ML, Material:Brass, Steel, Stainless Steel, Zinc-Alloy & Aluminum Alloy. Quick connector, QC-ML, Material:Brass, Steel, Stainless Steel, Zinc-Alloy & Aluminum Alloy. Connection Thread:NPT & BSPFinish:Nickel Plating, Zinc Plating & Chrome Plating. Quick connector