Features Direct Drive: The heating end of the 3D printer extruder is directly driven, leaving little space for wobbling the filament. Sturdy and Durable The 3D printer extruder hotend is made of aluminum, stainless steel and brass, which is wear-resistant and durable. IDEAL REPLACEMENT PART This extruder hotend is suitable for ET4, for ET4 Pro, for ET4X 3D printer, is an ideal replacement part. 100K Temperature Thermistor The temperature thermistor has 100K ohm, the hot end of the extruder head is high temperature resistant. With Pen: the heating end of the replacement printer extruder with pin is convenient to connect, easy to replace and install. Specification: Item Type:3D Printer Extruder Hotend Material: aluminium, stainless steel and brass. Applicable models: for ET4, for ET4X, for ET4 PRO, etc. Voltage and power of the heating tube: 24V 40W Operating temperature range: -40°C to +260°C. Aluminium heating block size: approx. 20 x 20 x 10 mm / 0.8 x 0.8 x 0.4 inches. Nozzle Size: 0.4mm/0.016" Usage: To replace the original extruder hotend Package list: 1 x 3D Printer Extruder Hotend Package List 1 x 3D Printer Extruder Hotend