Adrenaline Regulator ExtenderThe Adrenaline Regulator Extender threads onto any high pressure tank and adds approximately 1. 5" to the overall length. Like the new lightweight tanks but frustrated at the new shorter lengths? This is the perfect offset. Anodized black and comes with dual Urethane O rings instead of the cheaper black ones you see on most other extenders. It is also very easy to disassemble for re anodizing.