Alien 80% tungsten Steel tip darts feature unique barrels, giving extra grip and more control. High tech shafts and Alien fantail flights combine to create an aerodynamic performance which is out of this world. Each set comes with a superb Slimpack carry case. Product Features: • 80% Tungsten • High-Tech Shafts • Alien Fantail Flights • Slimpack Carry Case • 27g set Dimensions: L 155mm W 30mm.