Operating Termperature:-40--+140C ; Insert Parts:Brass ; Material:BMC/SMC Range:SM20,30,35,40,45,51,60,76 IT IS ONE KIND OF ISOLATOR PARTS ,DEPEND ON DIFFERENT SIZE;Operating Termperature:-40--+140C ;Insert Parts:Brass ;Material:BMC/SMCRange:SM20,30,35,40,45,51,60,76 SM DMC BUSBAR INSULATOR