?HIGH QUALITY: 42mm NEMA 17 high quality stepper motor with high torque and less heat buildup.
?EASY TO INSTALL:assembled MK8 extruder.
?WIDELY USED: It is compatible with most prusa i3 3d printers with some slight modifications when mounting it.?Anet A8,3D Printer Upgrade?.
?SAFETY: Ceramic insulation cotton ensure the hotend can heat to a high temperature fast and stably.
?100% MONEY BACK GUARANTEE: Contact us if you are not satisfied with it. We'll process full refund or send you a replacement without returning or any additional conditions. All issues will be solved within 24 hours.