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Don't be that guy who lets their friend smoke out of a dirty pipe. With the Upline Ash Catcher by Grav Labs you will never have that problem. Advanced Perconomics within the Upline Ash Catcher applies forced stacked Perc technology through a penetrating 8 cut disc diffuser downstem into a trio of stacked Percs. Each restriction signifies a whole new Perc section wherein airflow is poised against gravity and hydrodynamics stacking bubbles all the way up. In other words, this bad boy shreds and diffuses like no other ash catcher!