Heating Element manufacturer / supplier in China, offering 11409 Engine Block Immersion Heater Without Wire 3/4\" NPT Thread Stainless Steel Adapter 120 Volts 400 Watts Approved, 11407 Engine Block Immersion Heater 120V 400W Without Wire 1" NPT Brass Adapter Stainless Steel Motor Core Component Approved, 400 Watts, 120 Volts 3100003 Engine Block Immersion Heater 1" NPT Thread Brass Heating Element and so on.