The Black Brass Gary Anderson P2 from UNICORN is a dart set with barrels made of Black brass and is made for the novice darter. This set bears the name of the well-known Gary Anderson! The Black Brass Gary Anderson P2 is available in 3 sizes: 22-24-26 grams. 22G = Barrel Length: 51.00mm, Barrel Width 10.00mm. 24G = Barrel Length: 50.00mm, Barrel Width 9.50mm. 26G = Barrel Length: 49.00mm, Barrel Width 10.00mm.