... ,Passivated,Tin-plated,Sandblast and Anodize,Chromate,Polish,Electro plating,Black Anodize,Plain, Chrome plated,etc. Heat ... ISO standard, 100% whole range inspection through the production3inspection equipment: hardness test, torque test, salt spray endurance test ... standard, 100% whole range inspection through the production.3inspection equipment: hardness test, torque test, salt spray endurance test ...