Dual power, dual pleasure. GRAV’s has introduced their unique dual-action design into the interchangeable STAX collection and we can’t get enough. Once you’ve popped on your preferred mouthpiece (and as many perc inserts as you like!), load one side with flower and one side with concentrate for “Hallelujah!” levels of exhilaration! Or use the plug to keep it to a single material at a time--these engineers know what it’s like to have to get stuff done, too. But on the weekends… Both joints flow into a single 8-cut inline percolator for some serious filtration across a bubbling bed of water. The entire 7-inch piece is crafted from high quality borosilicate glass for durability as you’re taking on and off inserts. It’s even got a useful flared base for stability when stacking sky-high. Simply click the “Customize Your Piece: STAX” tag below to find your piece’s perfect mouthpiece and percs!