This DeMarini ONE14 Slowpitch Softball Bat is a top-quality product for advanced level softball players. The barrel diameter is 2 1/4 inches and the bat weighs 28 ounces with a slightly end-loaded swing weight. The bat is made of carbon composite material and has a black exterior color. It is suitable for both USSSA and ASA associations and has a model year of 2014. The bat is 34 inches in length and is designed for adult age group softball players.