Winmau Diamond Plus Tournament Bristle Dartboard with Staple-Free Bullseye for Higher Scores and Fewer Bounce-Outs Official tournament bristle dartboard staple-free bullseye allows higher scores and fewer bounce-outs Endorsed by the British Darts Organization; ideal use with steel-tip Angled divider wire directs darts for true scores Constructed from self-healing sisal fibers tightly bound for maximum durability Removable number ring for easy board rotation and extended playing life; board size: 17.75 in. diameter x 1.5 in.