Protective Case for Iphone 4 1.Material: Aluminum 1. ... Good quality 3. OEM is welcome Valuable Iphone Cases for Iphone 4 & 4S Business Scope CNC center machining ... chrome, aluminum alloy), anodized with various colors, PVD/PCD coating, polishing, ultrasonic wave cleaning, passivate,etc. Inspection CMM, ... requirement Rich-experience & good technical engineering support. Protective Case for Iphone 4