The Maestro Dimitri Van den Bergh 90% from UNICORN is a dart set with 90% Tungsten barrels and is the ultimate dart set from the Belgian dart player Dimitri Van Den Bergh. This personalized dart set from dancing dimi comes in 2 weights; 22-24 grams. 22G = Barrel Length: 48.60mm, Barrel Width 6.30mm. 24G = Barrel Length: 48.60mm, Barrel Width 6.50mm.