Three glass terp marbles in one pack, made to roll around inside your banger while you dab. Pair them with a carb cap and the airflow sets them moving. That motion spreads the concentrate across the hot quartz, so you get more from every dab and leave less residue behind. With three in the set, you have a spare when one rolls off the table. Check that the marbles fit loosely inside your banger before heating. Rinse them with a glass cleaner once they've cooled.