The Ultra 90% from BULLS is a dart set with barrels made from 90% Tungsten. The Ultra 90% darts consist of High Quality darts with a very unique coarse knurling grip. This dart set is available in 3 different weights: 21-23-25 grams. 21G = Barrel Length: 50.20mm, Barrel Width: 7.40mm. 23G = Barrel Length: 52.00mm, Barrel Width 7.45mm. 25G = Barrel Length: 52.00mm, Barrel Width 7.50mm.