Latest M180 integrated nozzle cooler on extruder. If you purchased M180 without nozzle cooler, you can still DIY to add to your machine. 

Please check [[http://malyansys.com/downloads/fan_new_14.12.11.stl|model]] and [[http://malyansys.com/downloads/fan_new_14.12.11.x3g|x3g]] for cooling support. There is a hanging wire (12V power for fan) hidden in front right corner of M180, you can connect to an external 12V fan. 

To enable cooler, please reference to: [[http://wiki.malyansys.com/doku.php?id=enable_pwm_feature_for_cooling]]