1,material: copper 2,plating: gold/nickel/tin 3,inside contact: brass and gold pate 4,high quality or reasonale price Description : 1 ... , 900/1800/2170MHz, Active Antenna, Mobile Phone, 3G, UMTS, Full Band, Dual Band2. Applications:(1) For GSM 900 / 1800 & CDMA/UMTS ... Card3. Features:(1) For Mobile 3G/UMTS 900/1800/2170MHz Tri-band(2) Compact Size(3) Glass Mount Design(4) Easy Installation ...