Description:Installation is very easy because the upgraded aluminum extruder is assembled in exactly the same way as the original plastic extruder.Our extruder kits have an adjustable bolt so that you can adjust the pressure of the extruder gear as needed.Made of high quality aluminum alloy, it is durable and stable.The outer diameter of the spring is 8mm, the inner diameter is 6mm and the height is 20mm. The inner diameter of the small socket is 3mm and the height is 10mm.There are two styles, one is left hand (1), the one is right hand (2). It is suitable for Creality Ender 3/Ender 3 Pro/Creality CR-10/CR-10S/CR-10S PRO.Item Name: Upgrade Extruder KitMaterial:Aluminum AlloySize:15cmx13cmx3cm/5.91inx5.12inx1.18inNotes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 X Small Socket1 X M3*8mm Countersunk Inner Hexagon Screw1 X M3*6mm Countersunk Inner Hexagon Screw4 X M3*10mm Half Round Head Inner Hexagon Screws1 X M3*18mm Cup Head Inner Hexagon Screw1 X M4*8mm Cup Head Inner Hexagon Screw1 X Spring1 X M4 Spring Washer1 X KJH04-M6 Quick Connector1 X U604 Bearing1 X 40 Teeth Copper Gear