Phatt Ass Glass color bubble caps are hand-blown from quality borosilicate glass and fit most flat top quartz bangers. Bubble caps increase airflow to maximize the vapor production of your dab making sure no oil, wax or rosin is wasted and all oil is vaporized. Bubble carb caps are effective and simple to use, just set the carb cap on top of your quartz banger or roll it in any direction to push your wax or oil to the corners of your nail ensuring all material is vaped. Carb caps reduce air intake leaving just enough space for a small bit of air to squeeze through, creating milky white flavorful dabs. PAG bubble caps come in a variety of beautiful heady glass colors.