W.M Darts Professional High Point Bristle Dartboard Professional 18" x 1.5" Bristle Dartboard. Moveable white Coated Number Ring helps to extend the life of the bristle dartboard. Blade wiring system (maybe the most slim wiring on the market) allows for more surface area on the board and reduces bounce out. Blade wiring system also reduces the bounce out Better chance for it to slide of and into the board. Top quality sisal for durability. Bristle board heals itself during play.