One of the most important components for dome and dome-less dabbing rigs is a crap cap banger. These bangers are used to regulate the airflow and to make sure you get the ultimate dabbing experience. Currently, the most popular cap in the market is the crap cap which is complete from every aspect. Specifications Size Cactus : 8.0 cm Donut : 4.5cm Pumpkin : 5 cm Crafted from borosilicate glass