This is a set of five nozzle throat tubes , five nozzle heads and five heater block hotends for 3D Printer. Designed for many common types of 3D printers. Solid aluminium construction with aperture. Offers you an to upgrade your hotend with plenty of brass extruder nozzles for 1.75mm Filament. Features - Color: As shown. - Material: Aluminum, stainless steel. - Size: 2 x 1.6 x 1.2 cm/0.8 x 0.63 x 0.47 inch. - This is a set of five nozzle throat tubes , five nozzle heads and five heater block hotends for 3D Printer. - Designed for many common types of 3D printers. Solid aluminium construction with aperture. - Offers you an to upgrade your hotend with plenty of brass extruder nozzles for 1.75mm Filament. - This stainless steel barrel has continuous thread so it is more universal than our standard barrel. It also has been drilled out larger end and a piece of PTFE tube(Not included) can be inserted to reduce the chances of "barrel lock" . - The 3d printer nozzle effectively prevents printhead leakage and produces consistent results with smooth and glossy finish. Package list: 5 x Brass Nozzles 5 x Extruder Tubes 5 x Heater Blocks