CR-10S PRO Btech double pulley extruder up for 3d printer

Suitable: For 1.75mm CR-10, For CR-10S, For Ender-3, For Ender-3 PRO
Double gear extrusion mechanism, high extrusion force, ensuring smooth feeding,
This aluminum alloy driver is specially designed for CR-10S PRO.But It can also be installed in Ender-3, Tornado, CR-10 and ender 5… stable and durable.
All-metal aluminum alloy, diy aluminum block, need to be assembled by itself
Better pressure pushes the filament into the printer nozzle