Cheap And Discounts 3D Printer BMG Extruder Clone Dual Drive Extruder upgrade Bowden extruder 1.75mm filament for 3d printer CR10 Ender 3 pro Bluer Wholesale. Buy Directly From Merchant Tengfa Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.