Phoenix Star 15 Inches Percolator Bong with Diffuser Ball Perc & Inline Diffused Perc PHX557 is well designed and functional. Made of durable glass, this perc bong stands at 15 inches tall and 5mm thick that can be used for a long time. Fixed downstem will allow you no worry about breakage. The matching echoing colors on the double perc, mouthpiece and base embellish each other and add a touch of beauty to this bong piece. 18mm bowls also included in these wholesale percolator bongs. Available in pink, blue, purple and green colors. This big bong features a diffuser ball percolator and a inline diffused percolator. The smoke filtration begins at the downstem perc and go through to the bottom chamber, where encounters the inline diffused percolator. Inline diffused perc has multiple slits which can offer a large amount of diffusion. Then diffusion bubbles travel to the diffuser ball percolator, the ball continues to break and diffuse the smoke and finally reaches to your mouthpiece. You and your customers will get nice clean and efficient rips with no harm to your lungs.