Features: Brand new and high quality The filament is gripped by the double drive much more firmly with less deformation, so it doesn't jams as much in the tube, nozzle or hotend. This idler gear is upgraded with two washers on both sides, so the sharpness gear will NOT ride against the bottom of arm or chew it up. Achieve smoother and more reliable 3D printing with this upgraded extruder kit featuring double gear mechanism. Suitable for 3D printing enthusiasts and professionals, this metal extruder is suitable for various printers. Perfect for home or professional use, this durable extruder upgraded is easy to install and enhances your printing experience. Specifications: Material:Aluminium Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set Double Gear Extruder