WINMAU's Aspria Dual Tungsten features the latest CAD CAM processing technology. Made from Winmau's unique Dual Core fused billets, with 95/85% tungsten front-loaded darts ushering in a new era of dart design, craftsmanship and performance, finished with Genuine Gold Plating and Onyx Coating. This dart set comes in 2 weights; 22-24 grams. 22G = Barrel Length: 50.00mm, Barrel Width 6.35mm. 24G = Barrel Length: 50.00mm, Barrel Width 6.70mm.