This Piranha Quartz Directional Carb Cap cap allows you to customize the airflow during your sesh. ABOUT PIRANHA Piranha sells more than just quartz products, we sell a high quality experience with a low price point. Our line of silicone containers, mats and storage for the concentrate market are always evolving. And we have over 50 different options in grinders that will last a lifetime... guaranteed! Check out the rest of our site to elevate your smoke.