Self-Healing Dueling Balls and Chain by SME. Made with the most durable self-healing material on the market, Rated for all calibers, No assembly required, just throw on the ground and start shooting, Dual colored balls for easy identification/game play, Comes with heavy duty rope and chain, 4" diameter targets. FEATURES Made with the most durable self-healing material on the market Rated for all calibers. No assembly required, just throw on the ground and start shooting. Dual colored balls for easy identification/game play Comes with heavy duty rope and chain 4'' diameter targets Mfg: Shooting Made Easy