Superior smoothness is guaranteed with the Pulsar Opal Recycler Bubbler, made to work with the Dr. Dabber Switch² eRig! This attachment is crafted from premium clear borosilicate glass with an angled neck design for comfortable use. Vapors are pulled from the eRig into the bubbler's swiss barrel percolator and circulated with water through the recycler system for extra refinement. A single opal marble tops off this awesome design.