WS 29.2 4-arm diffuser pre-cooler for 18.8 mm jointThis is a very special Precooler by Weed Star. It features a 4-arm diffuser to provide an extra smooth smoke. For those great milk shots.
The main joint is 29.2 (Zumo size on a Roor) and the detachable 4-arm diffuser slots into it, reducing the joint size to fit an 18.8 bowl.
