The new and improved Provost II HMD. This HMD has been one of the most used world wide and is very effective. It is meant to fit the AOT Heads and any regular bowl as well. All you have to do is foil your bowl and this amazing HMD on top with some charcoal and it is ready to go. The 2.0 has a subtle difference from the 1.0 and that is the hair flow, it will keep your bowl hotter for longer. Give it a try and you'll know what we mean.