Nearly new UO 9-point mirror cell. I am rebuilding my 13.1" tube dob into a trus so I don't need this anymore! I had to make slight modifications to the nylon screws that came with it, but you can get new ones for less than $1 at a hardware store. Great cooling with an open design. Easy to install. A must upgrade for that Meade, Celestron, or Discovery dob! New, these list at $50+ shipping.
Picture is of a smaller 3-point model, the one for sale is a 9-point, but you get the idea!