Thermal banger nails have an inner chamber that guards the concentrate from the full power of air intake during inhalation.  Thermal nails contain concentrates better than typical bucket nails, which is advantageous because all the concentrate vaporizers, leaving no waste behind. 

If you're into low temperature dabbing in a thermal nail, you should use this Solid Bubble Thermal Carb Cap that's designed for thermal nails.  This 2" x .75" crystal clear bubble carb cap made of durable borosilicate glass fits most banger nails.

The handle of the carb cap acts like a carb hole that allows you to easily regulate airflow to how you prefer it before taking a hit.  Your dab sessions will be more efficient, better tasting, and more enjoyable when you use this carb cap with your rig.