The 26M Launcher fits the medium sized balls (found this out because I bought the wrong size) and it works perfectly fine. They advertise being able to throw 3 times farther but as an athletic 22 year old I found that with the launcher I can throw about 25% farther with ease and with a little luck and exertion about 50%. I think this may be due to the arm of the launcher seemingly more flexible than I thought it would be. Works great for minimizing exertion/throwing out your arm and not having to deal with picking up a slobbery ball.