1)main material:porcelain 2)IEC,ISO9001,ANSI standard 3)Samples avaiable 2012 ceramic pin insulator 56-21) main material:porcelain2) standard: IEC ... ,ISO9001,ANSI3) Samples avaiable4) OEM/ODM5) Item no.: 56-1, 56-2, 56-3, 56-4, 56-56 series6) MAIN DIMENSIONS AND STANDARD PARTICULARS AS FOLLOW TABLE ... ! we will arrange everything for you. 2012 ceramic pin insulator 56-2