... (4J42,4J29) 4.Finish:Gold/Ni/Silver plating Fiber Optic Precision Metal Component-Case Module of package Material availableBrass,Copper,Kovar,Invar,WCu,Stainless steel, Aluminium ... comes first.4.Standard quality tests check of all types of products before shipment.5.Responsible for after- ... orders.7.Making progress with customers together. Fiber Optic Precision Metal Component-Case Module of package