... size available 3.Yellow zinc-plated. White zinc-plated. Name:Hydraulic Hose FerruleMaterial:Carbon Steel, Stainless Steel, Brass,alloy steel etc;Surface ... and gas etc;Our main products are Ferrule, Hydraulic fittings, Hydraulic hose fittings, Hydraulic adapter, Hydrualic connections, hydraulic 3-piece suit, union tee, union cross ...