Double the filtration, Double the smoother smoke! Made of 5 mm thick and high quality borosilicate glass. Main 2.5" chamber equipped with dual 8 / 12 arms percolator for maximum smoothness. Double bubblers not only look cool, they actually help cool off the smoke for smooth tokes. 4.5" diameter colored round base will balance the perfect for this bad boys. Thick bowl with matching color will add style to this beautiful bubbler bongs.