Specification Brand : BHOLSA BulletPoint1 : Purchase NoteONLY for 3D Printers with motor shaft over 20mm, please measure the shaft length before placing order.You can replace the full size of 42mm high stepper motor if the original motor shaft is too short to Install the gear. BulletPoint2 : Replacement KitPerfect extruder replacement kit for Ender 3 v2, Ender 3 Pro, Ender 3, Ender 5 Pro, CR10 S series, Tornado, etc. BulletPoint3 : Kindly ReminderPlease calibrate the E-steps from 100 to 139. BulletPoint4 : 【High-Resolution Printing】 - Designed for both high-resolution and high- applications, the 2 Gear Driver for Mk8 Anet A8 Upgrade utilizes optimized gear ratios to deliver unmatched thrust and rapid retraction. Whether you're using small or large nozzles, this kit adapts to your printing needs. BulletPoint5 : 【User-Friendly】 - The 3D Printer Extruder Kit is designed for ease of installation and use. Its compact structure allows for straightforward integration into various 3D printers, such as Mk8 Anet A8 and Ender 3, making it a convenient upgrade. Color : Red ExternallyAssignedProductIdentifier : 8081922057961 ItemName : BHOLSA Dual Gear Extruder Ender 3 v2 Upgrade Motor Shaft 20mm, Compatible with Ender 3 Pro CR10 Series 3D Printer TPU Filament Drive ItemPackageDimensions_Height : 1 centimeters ItemPackageDimensions_Length : 3 centimeters ItemPackageDimensions_Width : 2 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : 3d-printer-extruders Manufacturer : BHOLSA ModelName : BHOLSA ModelNumber : BHOLSA NumberOfItems : 1 PartNumber : BHOLSA ProductDescription : BHOLSA Dual Gear Extruder Ender 3 v2 Upgrade Motor Shaft 20mm, Compatible with Ender 3 Pro CR10 Series 3D Printer TPU Filament Drive ProductSiteLaunchDate : 2025-01-15T01:16:26.050Z Size : One Size UnitCount : 1 UnspscCode : 26101200