The Virus 70% from BULLS is a dart set with 70% Tungsten barrels and a nice entry-level model of the Bull's dart series. This dart set comes in 6 weights; 21 to 26 grams. The Virus Darts are made in New Zealand, where high-quality darts come from. The Virus dart has a firm grip and comes standard with Bull's Virus Powerflites, the green Bull's Glowlite Medium Shafts and the Bull's Steel Dart Points Black 35mm. Every official Bull's Virus Dart has the Bull's Logo laser engraving. 21G = Barrel Length: 50.50mm, Barrel Width 6.65mm. 22G = Barrel Length: 50.50mm, Barrel Width 6.90mm. 23G = Barrel Length: 50.50mm, Barrel Width 7.05mm. 24G = Barrel Length: 50.30mm, Barrel Width 7.35mm. 25G = Barrel Length: 50.40mm, Barrel Width 7.40mm. 26G = Barrel Length: 50.40mm, Barrel Width 7.45mm.