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7″ GRAV® Circuit rig made on 60mm tubing with an angled mouthpiece, 14mm quartz domeless nail, and two double decker bubbler chambers to cool and filter smoke.
The large GRAV Circuit rig is 7″ tall and made on 60mm tubing. Its intake hole is set into the body of the rig at an angle, creating a rapid spin and powerful centrifugal force, and its twin chambers are stacked to double the Circuit’s effect. The vapor is cooled and filtered by the speed and force of the water, while a sharp bend in the mouthpiece prevents water from exiting the rig. The large Circuit comes ready to use with a 14mm female-jointed domeless nail made of heat-tolerant quartz.