... rotor from damage. Product Characteristic The product uses the high quality copper material,(National Standard GB 59 brass),There is ... channel polishing procedure to guarantee produces,the superficial quality of material is even,handle slides,glass joyful, ... UMSecond Floor Acid copper ≥ 8 UMThird Floor Nickel ≥ 8 UMFourth Floor Chrome ≥ 0.3UM 2011~2012 High Quality Brass 8 Inch LED Shower Head-MS ...