Our extensive collection of bubble carb caps, which are some of the best directional carb caps around. Bubble caps have a bubble shape as the name suggests, and allows the carb cap to fit on a variety of banger sizes, from small to large diameter bangers. The smooth bubble shape allows you to angle the cap in every direction and easily control the airflow path during your dabs. Bubble Caps offer the most convenient and efficient way to take dabs.