The Viper Black Obsidian Sisal Dartboard is our flagship dartboard. The name refers to this dartboard's rich black colors and razor-thin spider wire that gives you the most playing surface area possible, and it's 100% staple-free. This steel tip dartboard has superior construction, starting with its Grade A Kenyan sisal fiber, which gives it more vibrant colors and top-of-the-line self-healing properties. The sisal biscuits that assemble the board are paper wound, instead of plastic, for a smoother sanding and finishing process. It also eliminates craters and creates a more even playing surface so your darts stick to the dartboard consistently. The Viper Black Obsidian dartboard is accredited by the World Dart Federation as an official tournament-ready dartboard, meeting all of their strict standards. It has a 17.75” diameter target area and is 1.5” thick, consistently sized double and triple segments, and a properly centered bullseye. It's a professional dartboard that is perfect for any player.