25mm Barrel Heater Coil25mm Barrel Heater Coil The 25mm heater coil works with the 25mm Quartz Banger. Heat is transferred from the sides of the quartz walls instead of the bottom. This is ideal for someone that wants to take low temperature dabs as the concentrate will tend to pool into the bottom of the dish. This will produce great flavor and effect. Features: 25mm Heater Coil (Barrel Style) Wraps around the sidewalls of the Quartz Banger (25mm) On a 4 foot Kevlar sheath