This is a standard extruder for 3D printers. This unit is not fully assembled and requires the user to insert the Teflon throat into the copper colored extrusion bracket and through the hot aluminum heat block to stop at the nozzle. The heat block comes with the heating element, and thermistor pre-inserted.
You will also find a 5 pin jst connector, a stepper motor, a fan, the bracket and bearing preassembled.
This unit operates with the typical A4988 stepper sticks and any compatible marlin firmware based board. It operates at 12VDC and can reach heating temperatures of 250C.