Quartz Terp Pearls Banger Balls Glow in Dark 6 Pack 100% Quartz Terp Pearls The terp pearls will spin around the outside of the banger as you take your hit.  while the pearls spin they will evenly disperse the heat, so as your tobacco flows around the bottom there are no spots hotter then others.  The pearls prevent puddles from forming on bottom, and give a cleaner better tasting smoke.