I have a brand new set of Prism2 original 3.5L counterlungs for sale, they are still in the plastic and have never been connected to a unit. Good for a replacement or a backup set. $300 OBO in Tampa, FL or free shipping within the continental US.
http://i.imgur.com/OobbO1L.jpg
http://i.imgur.com/tISH6Tr.jpg
