1 brass or aluminum male female connector 2 high quality ,gold suppier 3 tailor-made sevice ... 4 ISO9001:2008,BV,RoHS,REACH brass or aluminum male female connector Materials: iron, carbon steel, stainless steel ,aluminumFinish: plain, Nickle ... of precision instrument, hardness gauge,various gauges, thread gauge, digital display micrometer, dial indicator, mm card slot card, the inner hole ...