... :510g 3.Shape:Spur gear 4.Surface treatment:Zinc plated High quality cnc machining zinc plated steel spur gear Our Advantages :Over ... :Steel, Brass, Copper, Stainless steel, Plastic, Aluminium POM, Delrin, Titanium Alloy etc.2) Surface treatment:Zinc plating, Anodization, Chemical fim, Powder, Passivation ...