1.Made of anti-burn PC(UL94V-0),gold plating(01,03,06,15,30or50) 2.Frequency of use over 1000 3.Achieved ROHS and environmenta 1.Made of anti-burn PC(UL94V-0),gold plating(01,03,06,15,30or50)2.Frequency of use over 10003.Achieved ROHS and environmental protection standard