Not only does this bong have ultimate filtration, it can also be completely taken apart! The Three Piece Bong with Removable Downstems has three main pieces; the 3.5" base, a removable mouthpiece, and an ashcatcher. Inside the base and ashcatcher attachments are removable downstems that diffuse your smoke. One has a stereo matrix perc at the bottom while the other has a showerhead perc. Both of these downstems have an 18mm male joint at the top for connection to their necessary parts. The removable mouthpiece has an 18mm female joint as well. If you are a smoker who loves to take apart his bong or an intense cleaner, it doesn't get much easier than the Three Piece Bong with Removable Downstems.