Anderson TechZilla -9 Youth Baseball Bat 2.25 Barrel (31 inch) : The 2015 Techzilla 2.0 is virtually bulletproof! Our power arch, interior sleeve technology is constructed from our Aerospace Alloy. The multi-wall design is considered one of our most durable bats so youll never worry about your new TechZilla 2.0 denting or cracking in the middle of a season. We packed as much mass and muscle into the barrel to deliver bone crushing hits into the ball youll notice how quickly and effortlessly the ball will spring off the barrel.