The featured tee-ball bat in Mizuno's exclusive Jennie Finch Collection. Jennie Finch Collection: Created in collaboration with Jennie Finch with the softball player's specific needs in focus. MZ-1300: Lightweight, durable design, while providing better performance. Speed-Helix Grip: Designed to provide comfort and durability. Lightweight One Year Warranty: Warranted from defects in materials and workmanship for a period of one year from the date of purchase. USA Baseball Approved: Approved for USA Baseball play.