Titan Extruder Fully Kits for Titan Extruder for 1.75mm+Nema 17 Stepper Motor+V6 Bowden Extruder for 3D printer part Product Name: Titan Extruder Filament diameter:1.75mm V6 Bowden Extruder Nema 17 Stepper Motor The Vedio for how to install Titan Extruder: https://youtu.be/WOMGw3vaQPs