JH-C10 Porcelain Fuse Unit 1. Porcelain material 2. Certification: CE, UL 3. Metal inserted: copper, iron, etc. JH-C10 Porcelain Fuse Unit1. Porcelain material2. Certification: CE, UL3. Safe installation, good operation4. Competitive price and high quality5. Enjoy a high reputation in the world market