Phoenix Star 18 Inches American Color Rod Percolator Bong PHX531 is an 18 inches tall hand-blown glass bong. Decorated with American Northstar Glass Rod, the big size glass pipe features a recycler design for continuous filtration and airflow through flowing water to offer smokers the smoothest hits. The recycler pipe is equipped with four layers of honeycomb percs and a inline diffuser perc with eight slits in the tube for extreme percolation & filtration every time. The smoke passes through the undetached downstem to the inline perc to be diffused for the first filtration. And its four-layer honeycomb percs with dozens of small holes are designed for the second filtration. The bubbling water from the transparent glass will let you be relaxed.