Used Mizuno F19 Power Carbon Fastpitch Softball Bat 30 19 Black Purple 30 19:Black Purple and stuff sack with sewn in FBR 2I ML Md Lrg Blk Gry and stuff sack with sewn in set up guide It's been lab and field tested to ensure the best possible durability and function Detonator COR technology for low barrel compression Dual Frequency Dampener: 2 piece design for a great feel with less vibration Black Onyx Carbon Barrel to increase power with a shorter break in period Speed helix grip: designed to provide comfort and durability Cylinder seaming: allows for consistent performance and durability across the barrel Approved for: ASA 2 Piece bat utilizes a patent pending Dual Frequency Dampener™ construction to join a Black Onyx™ Carbon barrel and handle for an incredible feel