The BLACKOUT 1 90% from WINMAU is the latest generation with expert functional design, delivering a precision engineered range with stunning modern style and perfect grip, balance and feel designed for the advanced player. This dart set comes in 4 weights; 22-24-26-28 grams. 22G = Barrel Length: 50.80mm, Barrel Width 6.60mm. 24G = Barrel Length: 50.80mm, Barrel Width 6.90mm. 26G = Barrel Length: 50.80mm, Barrel Width 7.20mm. 28G = Barrel Length: 50.80mm, Barrel Width 7.20mm.