This kit provides a high-performance material feeding system with the ability to print faster with improved quality. The adjustable thumbscrew allows you to fine-tune the force acting on the filament. The housing parts are professionally SLS printed in nylon for maximum strength and precision. The quick-release lever lets you load and unload filament with ease for quick filament changes. Spring loaded pre-tension on the filament. This kit uses the original stepper motor that came with the printer and is installed in around 1h. Dimensons: 13.5 × 9.5 × 6.5 cm