How to use plug in heater.
When you need to raise up temperature, you make a diameter of 27mm hole at such point as you need and insert the above heater.
The length of a heater is flexibly designed up to 600 mm. For example, in case of die-cast of 350 tons pressure metal mold,
which is 540 kg, 3 sets of 500 mm length and 2KW power plug-in heater can raise up temperature to 213 degrees centigrade within
2 hours without using other heating sources at all.