Ceramic screw insulator MT606 1. porcelain insulator 2. factory directly best price 4. screw insulator Ceramic screw insulator MT6061. Glazed porcelain body2. Endure pull: 681 KG, 27204KG, 500KG3. screw: zinc-plated iron4. weight: 21KG5. packing: 50pcs/ctn6. carton size: 31.5*23*33cm7. payment: L/C, TT