GRAV Stax Cooling Glycerin Coil - Sub-Zero Bong Enhancement

Introducing the GRAV Stax Glycerin Coil! This incredible coil is made on 65mm tubing and filled with dyed glycerin that can reach sub-zero temperatures without freezing. The glycerin is sealed off from the interior of the coil and kept from leaking by a fixed screw cap. Smoke travels up the perc's central stem before descending through the coil. The prolonged exposure to glycerin cools the smoke substantially. The glycerin perc can accommodate any STAX base, mouthpiece, or perc. So why wait? Get your hands on a GRAV Stax Glycerin Coil today!