Hotend for MK8

Needed:2x M3 screw (long) - attaching the assembly to carriage2x M3 screw - attaching upper part of cooling fan 40102x M3 screw (longer) - attaching bottom part of cooling fan 4010 (space needed for fan duct attachment )1x M3 screw - attaching 50 mm fan to ductoptional 2x screws and nuts for BL-touch