The material â are always carbon steel, stainless steel or brass, and the material can be customized.// The surface of the ferrules are smooth, zinc plating or others customized.// Features: High functionality// Precise design// Durable// Normal size:1/4"-2"// Oem service according to customized drawing can be provided// We carries a wide variety of hydraulic hose ferrule fittings in common size, used mainly for crimping hose fittings.More other type ferrule, fitting and hose please feel free to contact with us. -