The Ultimate Weapon is your one-piece, single-wall alloy stick that's perfect for tourneys and leagues that don't allow multi-wall or composite barrel bats. You'll keep the line moving and the ball flying with this popular bat. Comes with a 1 year manufacturer's warranty from DeMarini. - 2 1/4 Inch Barrel Diameter - 12 Inch Barrel - One Piece, SC4 Alloy Construction - Approved for USSSA, NSA, ASA, ISA - 1 Year Manufacturer's Warranty