We specialize in supplying tungsten-related products, including the raw material of WO3, RPP, APT, and meanwhile, we manufacture many kinds of tools, such as tungsten carbide drawing dies, rings, seals, buttons, blades, rods, and so on. Please visit our website www.chinatungten.com & www.tungsten-carbide.com.cn for more information about tungsten.
Nowadays, dart billets/barrels made of tungsten are more and more popular all over the world, and we supply various tungsten dart billets/barrels and accessories as per our clients’ specific sample or design. Please refer to our website for a introduction, www.chinadart.com  
The main dart billet size & W contents as below.
dia. 1/4, 17/64, 9/32, 5/16 (inch);
length 1.5, 1.6, 1.7, 1.75, 1.8, 1.9, 2.0, 2.15 (inch)
65~95%W barrels & billets;
If you are interested in any of our products, please contact us directly. 
We would try our utmost to offer our best service and products to you at any time.