Compatible with all 3D printers using the V6 ecosystem (M6 thread), including Prusa i3 and i3 MK2 3D printers. The internal geometry of the V6 nozzles is optimized to reduce back pressure, ensuring smooth and easy flow of filament while improving retraction efficiency. The flat surface tip of the nozzle that flattens the layer is custom machined for each nozzle size. Small nozzle tip gives you high precision and large nozzle tip helps smooth printing of larger layers. All nozzles in the series are now individually identifiable with markings on the flats of the hex head, making them even more convenient to use. See the table on the left for identification.