Why do some carb caps not have an air hole for air flow?

Home Frequently Asked Questions (FAQ) All Products Why do some carb caps not have an air hole for air flow?

Some carb caps use groves carved from the sides to let the air come in and hit the puddle of concentrates allowing the to vaporizer better.  The carp cap is designed to get the air to flow over the concentrates rather than without on the air does not flow over the concentrates well, and leaves them below the airflow and the just heat up

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