Tungsten darts, Tungsten dart billets We can supply tungsten dart billets by various sizes and contents, popularly 70~90% tungsten is used for making both ... client’s specifications. We can also offer a range of different tungsten alloys, including W-Ni-Fe, W-Ni-Cu or ... upon demand. If you are interested in our tungsten dart, tungsten dart billets, tungsten dart barrels, please feel free to contact us. ...