The Bull’s Virus is an 70% tungsten dart set and is a nice entry-level model of the Bull’s dart series. The Bull’s Virus dart set is available in 21, 22, 23, 24, 25 and 26 grams. Virus Darts are being manufactured in New Zealand, famous for its high quality darts. The barrel of the Virus dart has a firm grip and comes with the Bull’s Virus Powerflite, Green Bull’s Glowlite medium shafts and the Bull’s Steel Dart Points Black 35mm. Each official Bull’s Virus 90 % Dart has the ‘Bull’s’ logo engraved in the barrels.