That means the original Kayfun experience meats modern day. The Kayfun Prime is a pure “mouth to lung” atomizer.
The Kayfun 5² is everything the Kayfun 5 is but bigger, combining simplicity, functionality and outstanding performance.
The PEI Tank Kit for the Prime is a tank version of compromise. A viewing gap on the bottom side of the tank provides certainty about the tank contents without losing the steel tank optics.