Features: 12V set: A full set of nozzles includes fan iron cover, blower fan, double gear extrusion, with aviation connector. 12V set suitable For Ender3 series 24V Kit: Full set of sprinkler for head including fan iron cover, cable and aviation connector. 24V set with complete set with XH2.54 terminals. For CR-10 series Easy to install Better printing on flexible materials Specifications: Item: 3D Upgrade MK8 Nozzle Dual Gear Extrusion Kit Voltage: 12V/24V (Optional) 12V Set: with the Aviation connector 12V Suitablr for Ender3 series 24V Set : with aviation connector.with XH2.54 terminals Set 24V Suitable for: ECR-10 series Color: As Picture Size: Mixed Package Includes: 1 Set x MK8 Nozzle Dual Gear Extrusion Kit note: 1.Transition:1cm=10mm=0.39inch 2.Please allow 0-2cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!