... of Origin: Shandong China (Mainland) Brand Name: WOTECH Model Number: stamping parts carbon steel: stainless steel Dimensions: ... Brass, aluminum or as per customer’s drawing.2. Surface treatment: polished, Zinc plated, nickel plating, chrome plating, ... drilling, threading, welding, polishing, assembly.Inspection:Coating thickness tester, roughness tester, Go/Not-go gauge, salt spray testing, and ...