PHOENIX STAR Beaker Bong Double 8 Tree Arms Perc 18 Inches PHX150 is made from durable boros glass with beaker base for stability. The glass pipe measures 18 inches in height and 7mm in thickness. This glass beaker bong is equipped with double 8 tree arm percs for better flavor.  After going through the downstem, smoke arrives at 8 arm percs to be diffused to create more bubbles and filtered for smoother hits. You also can watch the water rolling by the transparent glass for visual fun. This percolator bong also adopts ice catchers. After put ice pieces into the tube to offer smokers cooler tastes.