Bull's Justin van Tergouw 4.0 Black is a 90% tungsten dart set and is based on an old dart set of Justin's father (who died in 2006). The JvT 4.0 90% is a black titanium coating and has a ringed grip. JvT Darts are being manufactured in New Zealand, famous for its high quality darts. The dart set comes with the Bull's Powerflite JvT, the natural Bull's Nylon Medium Shaft and the Bull's Steel Dart Points Black 35mm. Each official Bull's Justin van Tergouw 4.0 90% dart has both the Bull's' and the JvT logo laser engraved in the barrels.