1、Stability and durability: DIY kit, you need to assemble it yourself. Our kit includes all the necessary screws and parts needed to replace the old raw weak extruder directly. 2、Easy to install: all you have to do is remove the original for Creality extruder and screw from the new 3、Advantages of metal extruder: Better pressure can be pushed into the printer nozzle to improve the performance of the printer. Our extruder kit has an adjustable bolt so that you can adjust the pressure of the extruder gear as needed. 4、High quality and durable performance. 5、Use simple convenient. Description: The improved MK8 extruder has a filament guide tube, all screws, spare drive gear and upgraded Bowden pipe connector for cr-10 3D printers. Our design provides full support for the elastic parts from the inlet and outlet. We have reduced the price and complexity of flexible printing. It also makes printing faster, longer, and risk-free. Frankly, it looks great and performs better than the plastic version included in the stock printer. It allows you to print elastic materials and regular plastic filaments. Features: 1. Stability and durability: DIY kit, you need to assemble it yourself. Our kit includes all the necessary screws and parts needed to replace the old raw weak extruder directly. 2. Easy to install: all you have to do is remove the original for Creality extruder and screw from the new "metal extruder" and get ready to start printing. Used for 1.75mm long 3D printer MK8 Bowden extruder rack. 3. Advantages of metal extruder: Better pressure can be pushed into the printer nozzle to improve the performance of the printer. Our extruder kit has an adjustable bolt so that you can adjust the pressure of the extruder gear as needed. 4. High quality and durable performance. 5. Use simple convenient. 6. 100% new and in good condition. 7. Original aluminium actuator for Creality 3D printer cr-10 series, cr-10 S4, cr-10 S5, cr-10 Mini, cr-10 s, cr-10 Plus. Specifications: Condition: 100% Brand New Color: As picture show Material: Aluminum Size: Approx. Left Hand: 4.2 x 4.2 x 1.5(Thickness) cm / 1.6 x 1.6 x 0.5 in Right Hand: 5.5 x 2.5 x 1(Thickness) cm / 2.1 x 0.9 x 0.3 in Weight: Approx. 67 g Package Included: 1 x For Creality 3D-extruder Upgrade Kit Notes: 1.Please allow 1-3 cm error due to manual measurement. Thanks for your understanding. 2.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 3.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.