Diabolo vital statistics: diameter: 115mm, width: 120mm, This medium sized diabolo from Henry's is the standard size model of the three greats (kolibri, jazz and circus). The build quality is exceptional and can be seen at every level. The cups are made from a complex rubber polymer which keeps the Diabolo rotating fast without compromising on stability. The rubber is soft enough to absorb impacts but hard wearing enough to take years of abuse without losing its qualities. The anodized aluminium hubs are precision built to the exact dimensions of the cups, and tested for symmetrical weight distribution. The axle is shaped for the string and polished to ensure long stable spins. The jazz is perfect for all serious diabolists, and is considered the best diabolo by many.