8" Round Water Pipe8" Round Water Pipe The 8 inch Round Water Pipe from Grav Labs is simple yet effective. The big base chamber gives you a massive amount of space to fill with smoke for such a short setup. It features a pair of ice pinches in the main stem so you can add some ice cubes and go for ultimate chill if that is your style. The removable diffused downstem is adorned with a 14. 5mm female ground glass joint and comes with a 14. 5mm male bowl to match. Beaker