This double barrel hammerhead recycler is an amazing dab rig or water pipe. Watch your smoke filter over and over again as it recycles through the rig's two chambers and inline percolator. If inline percolators are new to you, then you are in for a pleasant surprise. These percs are very effective at filtering smoke, since they are of long length and possess multiple diffusion slits. The bottom chamber works as a filtering chamber, while the top chamber works as a recycling chamber. In other words, the top chamber serves the purpose of redirecting water back into the bottom chamber for more filtration!