Skyrail Ottovolante Maxi 20 Marble RunWith Skyrail Ottovolante Maxi you can build fantastic suspended marble tracks for up to 20 meters of spectacular aerial development that can instantly become the absolute superstar of your bedroom. The tracks are even more exciting thanks to the new parabolic curves complete with edges so you can create even more daring and exciting tracks. All parts are accurately designed so you can use the 8 marbles included, of 19 mm in diameter, but also marbles