I believe that is what I have on mine. They still leak, smell, and in general cause frustration. I don't consider that a fix. All it is, is an empty plastic container that closely fits the shape of the transom well, limiting the amount of water the well can hold. The bottom, sides, and top around the "float" still hold water and the problem is still there. I was hoping for something more.
The pictures I posted are the top of one while sitting in the well. I will post a complete photo. The water in the far right photo was already in there, the hose had not yet been turned on.