Grav Labs 7" Two Layer Circuit Rig

This is the Official 7" Two Layer Circuit Rig from Grav Labs. The two layer circuit rig is made out of Borosilicate Glass, the tubing on the circuit rig is 60mm tubing with an angled mouthpiece, 14mm quartz domeless nail, and two double-decker bubbler chamber this will allow the smoke to cool down and be filtered.