Here are the Folbot pontoons. It has an outer cover and an inner bladder. The top piece that holds the pontoons to the outrigger quickly snaps into place with buckles. The pontoons are 37 inches long and 9 inches diameter in the middle. From what I have read from other who own these pontoons say it skims over the water rather then digging in as some do. I did find one guy that did say he was able to submerge his once while sailing. What you see in the picture was $156 including shipping which I felt was a good price. I will most likely buy their AKA rather then retrofitting what I have. It took about 30 breaths to blow it up.

John