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 was calculated mathematically to achieve optimal flight characteristics. It is made of 90% tungsten. In addition to its aerodynamic shape, the barrel has an aggressive grip. The striking Sigma engravings are another highlight of this dart. Additional stability in the flight phase is provided by the special Sigma One Shaft and Sigma 900 Flight. Available in weights from 21g to 25g.