The 2022 Windy City Mushball Slowpitch bat is built with a one-piece SC4 alloy and comes in a variety of heavier swing weights and sizes so you can pound that ball into oblivion. Comes with a 1 year manufacturer's warranty from DeMarini. - 2 1/4 Inch Barrel Diameter - 1-piece design - SC4 Alloy - 12.5" Barrel - For use with 16" Mushballs - Designed and assembled in the USA - Approved For Play In USSSA, NSA, ISA and USA Softball - 1 Year Manufacturer's Warranty