Stainless Steel (All Metal) Heatbreak M6x1.0mm w/6.0mm Long threads.

4mm PTFE tube passes through, to Nozzle

Fits:

Chimera/Kraken

Creality MK8 Style (CR-10/20/X, Ender 3/3Pro/5/5Pro/5Plus )(NOT CR-10S Pro/Max)

Artillery X1 V4.0+, Genius w/Volcano And slotted heat-break