This is the Sherpa Mini Extruder, a ground up design developed by Anlin and the team at Annex Engineering. It's a dual geared hobbed filament extruder designed for use with any printer. It features a 5:1 gear driven design to provide torque while being able to be near silent. You must perform your own tuning to get the best results.

Features:
Fully assembled, easy to install and use. SLS molding shell, made of PA, strong and durable.
Compatible with CR-10/4S/5S/MINI, CR10S, CR-20, Ender-2, Ender-3/PRO/V2, VORON 3D Printer.
Parts Note: The E-axis step value of extruder needs to be modified. For example, the E-axis step value of Ender3 is 691.
The drive current of the extruder needs to be adjusted to 0.35A (method: adjust the voltage to about 0.28-0.3V or firmware to adjust the drive current of the E axis) Reason for adjusting the current: prevent the motor from overheating.
Modification of extruder pulse method: Method 1: Firmware modify the extruder pulse: #define default_axis_steps_per_unit {80,80,400,691} Method 2: Send G code (can be sent by using Slicing Software command): M92 E691 M500

Specifications:
Name: 3D Printer Extruder
Shell Color: Black
Shell Molding Process: SLS
Shell Material: PA
Cable Length: About 1.2 meters
Item Weight: 122g / 4.3 oz

Packing List:
1 * 3D Printer Extruder