Not only is it built to be regulation size, Vipers Dead-On Bristle Dartboard is constructed out of compressed sisal fibers, a high-grade material with self-healing properties. Because sisal fibers return to their original shape after you remove darts, this board will last much longer than a wood or compressed-paper dartboard. The galvanized spiderwire framework and the staple-free bulls-eye dramatically reduces the chance for bounce outs. Accommodates steel-tipped and soft-tipped darts. Dia.: 17.9. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Board & Other Games.