I order the 26L.  The chucker is great and saves the arm a bunch of energy (hence the 2 stars not 1).  However, the ball was done within 5 minutes.  Punctured on the fourth fetch, torn in half by the tenth.  I like the idea, but the ball needs to be stronger to hold up to the strong clamping jaws of my beloved pits.  The dogs never played with the ball by themselves, it was only during play with me that they punctured the ball.  VERY disappointed in ball quality.  If you have a weak jawed dog this might be good for you ;)