1.Insulating resistance:more than10M 2.Electric strength: more than2000V 3.Useful time: 5000hours 4.Cooling uniformity Specification:1.Voltage: AC380V,220V,DC220V,DC1102.Rating power: 50~500W±13.It's made of heat sink of aluminum alloy and heating wire of high quality alloy.4.Features: small cubage, beautiful appearence, thermolysis uniformity, Fast heat conduction.5.Useful time is longer than ...