The Nano Bell Cap by Chris Mun is designed and built for the Kayfun (Not compatible with the Kayfun 4)
This cap screws directly on to the base of the Kayfun, and replaces the rest of the tank section, leaving the chimney and chamber intact. Drip tip feeds directly into the top of the Bell Cap. Bell cap pictured is after being polished.
[Note: It's recommended that you use the stock Kayfun drip tip with this cap, to ensure no leaking occurs. If using another drip tip, ensure that the O-ring is wide enough to prevent leaking.]