The FlowTech nozzle is designed to be a leak proof and offers an effortless and quick nozzle replacement process. FlowTech design seamlessly integrates the thermal tube with the nozzle, effectively resolving the most prevalent challenges encountered with conventional hotends: nozzle leaks and nozzle replacement inconvenience. Features: Cold Nozzle Change Leak-proof design HighFlow Fits: Micro Swiss FlowTech Hotend for Creality K1 / K1 Max Made in USA by Micro Swiss