... cases are made of polycarbonated materials, not ABS material case,so the temperature endurence is much higher; Detailed Product ... Description1. Polycarbonated case, 2. Imported silocon core, 3. Cross checked parameters, 4. CE/Type Tested. EP Series split core current ... transformer.1. All the cases are made of polycarbonated materials, not ABS material case, so ...