The single head tube is called a cartridge heater in foreign countries, which is also a similar term because the shell of the cartridge is cylindrical and one end is also blocked, which is similar to the saying in China that the single head tube is a clever and identical work. In the late 1990s, due to the widespread use of electric heating tubes in China, the shapes of electric heating tubes also became many. In southern China, the electric heating tubes used for molds with one end output were called single head tubes or single end electric heating tubes, which were very similar.
Single headed tube, also known as single ended electric heating tube or cartridge heaters, is a type of electric heating tube (tubular electric heating element) that has been known for a long time in China's electric heating industry as the M3 model.
Advantages of single headed pipes:
1. High power, 2-5 times the power of a normal electric heating tube, it can achieve a surface area of 20 watts per square centimeter, and even 60 watts per square centimeter in foreign countries. 
2. It has the characteristics of simple structure, high mechanical strength, high thermal efficiency, safety and reliability, easy installation, long service life, no pollution, and low price. At the same time, it saves electricity and is safe to use. It can be bent into various shapes, lightweight, and easy to disassemble.
3. The diameter is small and can reach 3-25mm.
4. The length is not limited and can reach 20-2000mm.
With the continuous development of business, the single head tubes of Foshan Feiyue Electric Heating Technology Co., Ltd. have been sold nationwide and even overseas.