30mm Outer Diameter.

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Terp pearl spinner!  These cyclone carb caps are all the rage.  These super cool new innovative caps have two carbs built in.  One for the air flow directly into the banger, and one through the curved chamber.  This allows maximum customization for your dabbing experience.

With the dual carb cyclone carb cap you can turn the air flow on and off in the specific method you choose.

We've tested them  Smokin Js seal of approval!  Specifically with a flat bottom quartz banger, this carb cap makes the terp pearls sing and sling around the banger.