Mizuno F20 Finch Youth Tee Ball Softball Bat (-13) Jennie Finch Collection created with the softball players specific needs in focus. MZ-1300 Alloy for lightweight swing weight. Cushioned Grip for comfort and a soft feel. One Year Warranty. Features: Cushioned Grip: For comfort and a soft feel. Lightweight Approved for ASA play. Approved for USSSA play. Approved for NSA play. Approved for ISA play. Approved for ISF play. Warranted from defects in materials and workmanship for a period of one year from the date of purchase. MZ-1300: Lightweight, durable design, while providing better performance.