High Strength, Competitive Price, Good Technical Service, Delivery Goods on Time, Stable Quality, Great Performance. High-voltage post insulators for transmission linesModel : ps-15/300Nominal voltage: 15KVMechanical failing load: 3KVcreepage distance: 300power frequency withstand voltage(Dry ) : 70KVpower frequency withstand voltage(Wet): 40KV lightning impulse withstand voltage: 105KV