Bubble Carb Caps are the latest craze among dabbers who use quartz bangers. They work even better with thermal bangers, also known as double walled bangers. These directional bubble carb caps allow you to move the cap around to ensure you vaporize all of your wax. The bubble design allows you to control the airflow direction to maximize wax vaporization for lower temperature dabs. This directional carb cap is a must have dab tool!