... available 3.Yellow zinc-plated. White zinc-plated. Name:Hydraulic Hose FerruleMaterial:Carbon Steel, Stainless Steel, Brass,alloy steel ... etc;Our main products are Ferrule, Hydraulic fittings, Hydraulic hose fittings, Hydraulic adapter, Hydrualic connections, hydraulic 3-piece suit, union tee, union ... , matched with many kinds of pipes such as SAE, DIN, EN, GB etc2) Metric Fitting Flat Seal Fitting, ...