West3D's Undertaker Tungsten Carbide Nozzle (V6, Volcano, MK8, K1, FIN)

Lay your other nozzles to rest with the one nozzle that may just outlive you. The Undertaker Nozzle is full body K20 Grade Tungsten Carbide, no inserts - they didn't stop at just the tip and they didn't use any other materials. This is a V6 style nozzle.

When West3D set out to develop their own nozzle, they knew right away what it had to be. Tungsten Carbide is one of the hardest materials on earth (9 Mohs), has the thermal conductivity of Brass and very low thermal expansion. This nozzle will survive abrasives and anything your printer can throw at it. 

West3D is now offering Undertaker Nozzles in two variants: AlTiN Coated and Traditional. Both offer superior quality from other nozzles, and they still use their traditional nozzles in most applications. Their coated nozzles offer increased hardness and wear resistance and reduced friction especially for sticky filaments. Both can still withstand high temperature limits allowing you to do cool things like blow torch your nozzle to clear a clog. 

The V6 Style nozzle works with most standard hot ends (non Creality/MK8 style)

The MK8 Style nozzle works with many non K1 style Creality printers such as the CR10 / Ender etc.

The K1 Volcano Style works on Creality K1 / Comgrow T300 (with removable nozzle) / Sovol SV08 (with removable nozzle) or other printers that use this style nozzle.

Source: https://try3dp.altervista.org/en/nozzle-materials/