Birzman Aeroman rear hydration system for ISM

Looking for a good and affordable rear hydration system wich is adjustable, stable, can hold 2 bottle cages (even three with some easy modifications!)?
Don't look any further, you've just found it.

With a weigth of about 140grams it is a good and stable way to carry your hydratation and other accessoires with you during your ride.

Multiple water bottles along with the Birzman Aeroman

There are 2 holes with m5 thread on both the side and the end.

Also included are a number of spacers. These allow you to place bottle cages in different ways. And if you are a bit creative (longer bolts, not included) you can even mount 3 bottle cages.

Similarly, the mounting on the various saddles. As the photos show, this system also simply fits an ISM PN3.0 and ISM PN3.1, among others. There were few or no solutions for this until now.