ITEM NAME:Dual Gear Extruder Upgrade Aluminum kits Dual Drive Extrusion for Ender-3 Description: 100% brand new, high quality and durable. Double gear extrusion mechanism, high extrusion force, ensuring smooth feeding All-metal aluminum alloy, diy aluminum block, need to be assembled by itself Better pressure pushes the filament into the printer nozzle Efficent increase the printing speed, help to precise printing. Specification: Size: 150x100mm/5.9x3.94inch Package Includes: 1 piece Extruder parts (default the right) SKU: ALU0002980977016228.1 piece Extruder parts (default the right). Efficent increase the printing speed, help to precise printing.