Cartridge Heater, Thermocouple, Silicone Heater manufacturer / supplier in China, offering 48V 500W Water Immersion Tubular Rod Solar Heating Elements with Thermostat, 24V/36V/48V DC Electric Tubular Solar Water Immersion Heater with Thermostat, 12V 24V 48V DC Dual Valtage Immersion Electric Resistance Water Solar Heating Elements with Temperature Control and so on.