This is a standard extruder for 3D printers. This unit is not fully assembled and requires the user to insert the Teflon tube into the copper colored extrusion bracket, through the hot aluminum heat block and into 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 and 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.