The Maestro Ian White 90% from UNICORN is a dart set with barrels of 90% Tungsten and is the ultimate dart set from the famous darts player Ian White. This dart set contains a blue ringed grip and a laser engraving of a diamond! This set comes in 2 weights; 23-25 grams. 23G = Barrel Length: 48.26mm, Barrel Width 6.48mm. 25G = Barrel Length: 48.26mm, Barrel Width 6.73mm.