The cartridge heater for 3D printers is a device used to heat the build surface or nozzle of the printer. It is typically inserted into a specially designed opening or probe and is used to heat the area where the printing process takes place. Cartridge heaters are highly efficient and quickly reach the desired temperature, providing stable and uniform heating of the build surface. They are compatible with various types of printing materials and are essential for the successful execution of projects with 3D printers.