Cool Carb CapsThis Directional Carb Cap from Pulsar is made to fit most quartz and titanium banger nails. Made with borosilicate glass and comes in assorted accent colors. These carb caps have a worked honeycomb design and provide directional airflow while you are dabbing. Being able to direct the airflow helps ensure that you get the most efficiency with your concentrates and they get completely vaporized. Diameter measures 25mm wide.