Viper Razorback Official Competition Bristle Steel Tip Dartboard Set with Staple-Free Razor Thin Metal Spider Wire for Increased Scoring, Reduced Bounce Outs; Self-Healing Premium-Grade Sisal Board Constructed from self-healing sisal bristle fibers compressed together, providing unsurpassed durability Staple-free spider utilizes razor thin galvanized wires which greatly increases the surface area, helping prevent bounce-outs Viper Razorback is an official tournament size board, measuring 18" in diameter and 1.5" D A movable number ring further extends the dartboard's life Dartboard accommodates both steel tip and soft tip darts and includes mounting hardware