The only piece worthy for the god of thunder is about to unleash some epic clouds! The all NEW Thor's Hammer Rig is 12 inches tall and contains TWO levels of percolation power. The smoke first begins its filtration process with a 4-inch inline perc with unparalleled diffusion. From there, the smoke works its way upward through a finely-cut 10 tree-arm perc in the middle chamber of the rig. The bubble stacks created here are incredible! Every rig comes with a matching 14mm bowl.