Ø7.15x54.6mm 90% tungsten dart billet price is 4.80USD/PC on Apr. 16, 2019. In a dart, barrel is the main part, which is made in different shapes, from cylinder. The best material to manufacture these barrels is tungsten, as it is very dense, and can made slim dart with a considerable weight. As 100% tungsten is difficult to machine, popularly 70~90% tungsten is used for making dart billets. Their weights are varied from different tungsten contents and rod sizes.