Features APPLICABLE MODEL: The extruder is suitable for ET4, ET4PRO, ET5, ET5PRO 3D printer, possess small size, compact structure, simple and quick assembly, good compatibility APPLICABLE MATERIALS: 3D printer extruder support a variety of 1.75mm printing wires, such as PLA and ABS, for a wide range of applications, very versatile WITH STEPPER MOTOR: The extruder adopt a 42 step motor design, and the shaft speed is fast, ensuring the efficient and safe operation of the 3D printer WITH NOZZLE AND HEATER: The 3D printer extruder head kit come with a standard 0.4mm nozzle, 24V 40W heater and is approximately 1.5 meters, that is 4.9 feet long, to ensure accurate printing STRONG METAL: Extruder is made of excellent metal material, possess high hardness, wear resistance, no deformation, and long service life, you can use with confidence Specification: Item Type: 3D Printer Extruder Head Kit Applicable: for ET4, ET4PRO, ET5, ET5PRO Nozzle Diameter: 0.4mm(standard) Motor Model: 42 Stepper motor Speed: 20-120mm/s Nozzle Flows: Approx. 24ml/h Printing Material: ABS, PLA 1.75/3.0mm Fan: DC 24V 0.09A, Approx. 40 x 40mm / 1.57 x 1.57in How to Use: Direct installation Package List: 1 x Extruder Head Package List 1 x Extruder Head