The Empire Glassworks Honey Drip Carb Cap is made to fit most quartz and titanium banger nails. Handmade in the USA with American glass rods. The carb cap features a fun honey and bee design. These carb caps give you directional airflow while you are dabbing that helps ensure that you get the most efficiency with your concentrates and they get completely vaporized. Diameter measures 29mm wide.