ITEM NAME:New -Aluminium Cr-10S Pro Ender 3 Btec Double Gear Pulley Extruder Upgrade O8V3 New -Aluminium Cr-10S Pro Ender 3 Btec Double Gear Pulley Extruder Upgrade O8V3 1. A stepper motor is characterized by converting a series of input pulses into precisely defined increments of the shaft position. 2. Stepper motors can be widely used in 3D printers, CNC engraving machines, etc. 3. Double gear extrusion mechanism, high extrusion force, ensuring smooth feeding 4. Low noise and high torque, this is a good choice if you need a stepper motor. 5. The aluminum alloy driver is supplied with CR-10S PRO. It can also be installed in Ender-3, Tornado,etc. description: color:picture color Extruder advantages: 1. All-metal aluminum alloy, diy aluminum block, need to be assembled by itself 2. High quality 3. Better pressure pushes the filament into the printer nozzle Motor description: Creality Stepper Motor 42 motor for 3D printer CR-10 CR-10S Note: This project is an Creality 3D stepper motor, 100% brand new, high quality! Size 42x42x40mm Nema 17 stepper motor 1.5A 3D printing two-phase 4-wire 1.8 ° feature: This is a high quality motor that can be used for long periods of time without getting stuck. It has fairly stable performance during operation and does not lose steps. Material:Aluminium alloy Creality Stepper Motor 42 motor for 3D printer CR-10 CR-10S Package Contents: 1 * double pulley extruder 1 * 42 motor (height 40mm) 1 * motor line 1 * screwdriver 1 * TMC 2208 v1.2 driver 1 * heat sink 1 * bubble bag