The Toro Grail Quartz Bangers by Toro Glass. These 100% Quartz Bangers make it easy to turn any 10mm glass joint into a domeless concentrate nail. Available in Minus (-) these unique quartz bangers allow you to pick your design based on your personal drag and airflow preference. A Minus (-) Grail has only one smaller sized slit which allows for more drag and contains a shorter dish. The 22mm size bucket allows for high volume while bringing out the best flavor of your favorite oils. Being that quartz is purer than traditional glass, these vapor slides have a higher burning temperature making them a superior choice over other glass concentrate nails.