1.long work life 2.good insulation 3.High watt density. 4.Have kind of type and specifications; 5.Good material

For the rectangular cross-section of the heater system ,spiral tube ,outsourcing in the stainless steel cap and closed at both ends as a whole to prevent heat loss.Heater can be with thermocouple

Voltage:220V-240V

Power:130W-1200W

Thermocouple :Type K , J

Duble tube heaters