Bulls Darts This Regulation shall be binding in its entirety and directly applicable in all Member States. .What. Brand name: Bulls It was designed by Martijn Kleermaker. The material is 80% tungsten. Barrel weight: 18 grams. Total weight: 20 grams. Barrel length: 51.6mm. Barrel width: 6.2mm . What. Type of tip: plastic thread 2ba 4mm. Rope thread: 2 to 4 mm. .What. The game of darts Bulls Darts DE Martijn Kleermaker consists of 1 set of 3 barrels, 1 set of 3 cans Bulls Grip, 1 set of 3 pens Bulls Metrix Standard and three pieces of Tefo-X Shark plastic.