The EHPro Origin is a sophisticated mechanical mod with some unique features. First, it has 3 body tubes allowing the use of 18350, 18500 or 18650 batteries, or any of those batteries with a Kick! Although the mod does not telescope, the positive pin can move to account for small variations in battery sizes. The contacts are made out of brass for excellent conductivity. The switch is magnetic, and allows you to adjust the length of the throw as well as the point of actuation so you can customize to your own preference. The EHPro Origin also has a locking ring, but unlike most other mechanicals, it is NOT reverse-threaded. It's also smaller than it looks like in any battery mode, being only 21mm in diameter. Lastly, if you also have the EHPro Aqua atomizer, you can couple it with the Origin and make it into a hybrid tank! The Origin is a beast of a mod for the advanced user.