This DeMarini Cat Osterman inspired fastpitch softball bat is designed for durability and performance. 7046 Aluminum Alloy provides the durability witha stiff Flex Index of 4. The variegated Comfort Grip is for looks as well as feel. Thihs bat has a bottle bat profile and is approved for play in the following associations: ASA, USSSA, NSA, ISA, ISF and comes with a 12 month limited warranty.