Viper League Regulation Bristle Steel Tip Dartboard Set with Staple-Free Bullseye, Galvanized Metal Thin Radial Spider Wire; High-Grade Compressed Sisal Board with Rotating Number Ring Extending Life Constructed from sisal bristle fibers compressed together, providing unsurpassed durability Features a staple-free bullseye which helps prevent bounce-outs; A movable number ring further extends the dartboard's life Viper League is an official tournament size board, measuring 18" in diameter and 1.5" D Utilizes thin, rounded galvanized wires that allow darts to slide off the spider and land in the target area Dartboard accommodates both steel tip and soft tip darts and includes mounting hardware