Standard Quartz Banger Carb Cap
This carb cap actually lowers the temperature of your dab hits while simultaneously allowing you to get maximum flavor out of your concentrates.

All you have to do is place the cap over the quartz banger nail and watch the magic happen in the form of thick vapor clouds. The cap is equipped with a single airflow hole that regulates vaporization. It will fit on most standard sized quartz nails.
Standard Quartz Banger Carb Cap