preemo - 16 inch Sprocket Perc Recycler BongThe preemo 16 inch Sprocket Perc Recycler Bong is a serious piece of equipment. This impressive recycler bong is designed with a 12 hole sprocket percolator housed in a large chamber, leading to a single tube coil percolator. Together, they ensure the smoothest, cleanest hits possible by maximizing smoke filtration and returning back soft buttery smooth hits. The additional recycling stems and large neck allow water to return to the bottom chamber