made of premium boros glass, measures 18.5 inches in height. The glycerin bong features two detachable parts: the top part with glycerin coil and the bottom part with percs, which are connected together tightly via a plastic keck clip. The matching color on its glycerin coil, keck clip, percs and wide & round base complement each other. Black, green and blue three colors available in Phoenix Star. This Phoenix glycerin bong is equipped with diffuser ball perc & gridded inline perc to diffuse and filter the smoke to offer you smoother taste without hitting your lungs to hard.