The Hyper Mach 3 features an improved carbon material layup structure with a high-elasticity special sheet embedded in the outermost layer of the taper section. These synergistic effects cause the bat to flex more, generating a stronger hit due to increased swing acceleration up to the point of impact. This is a Rawlings Hyper Mach 3. Weight: 540g, Length: 80cm Model number: BJ9HYMA3T I purchased it used and have been using it for about a year.