It incorporates a quartz heat sink in the bottom of the bucket that retains steady heat for long periods of time and optimal performance. The heat sink creates a heated canal between it and the wall which stays the ideal temperature for longer than traditional bangers on the market. The Quartz Reactor Banger features a 4mm Quartz glass, 8mm Quartz heat sink and 14mm joint. If you are looking to get longer, better tasting sessions then look no further than the Quartz Reactor Banger. At a great price, don’t miss out!