The ultimate aerodynamic Sigma 900 is here. Sigma darts are designed so that the barrel, shaft, and flights together form a unique aerodynamic unit. The Sigma shape has been mathematically calculated to achieve optimal flight characteristics. It is made from 90% tungsten. In addition to its aerodynamic shape, the barrel features an aggressive grip. The striking Sigma engravings are another highlight of this dart. Additional stability during the flight phase is provided by the special Sigma One shaft and Sigma 900 flight. Available in weights from 21g to 25g.