BMG Dual Drive Extruder Gear No reviews $3.00 1 set - $3.00 4 sets - $9.00 Quantity 1 set 4 sets 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Dual drive extruder gear wheels for Ender 3 V2, Ender 3 Pro, Ender 3, Prusa i3 MK2/MK3 3D printers' double geared extruder replacement.