Purpose:Applies to AC rated voltage 300/500 v and below of electrial appliances ,of smaller size motoriace tool ,of instruments,of various meters and motorized lighting installation. Workig temperature:no more than 70?C Made of 99.95 percent of high-grade copper,selected high-quality plastic. Has excellent electric insulation property ,machanical property, non-inflammabilty.it is safe and convenient in insulation and shath delivery requirement.