SL senior league big barrel baseball bat from Combat features a one-piece, precision molded, seamless construction. The Portent technology provides zero vibration or sting and a matched bat frequency with hoop mode to alter all feedback, which leads only to a flawless store-and-release monster.Combat's engineering team has over 100 years of combined experience in designing and manufacturing composite sporting goods and they also play the sport. At Combat, player and engineer are one, creating an advantage that has allowed them to create products on the cutting edge of technology that give you that on-field performance advantage. Combat: For Players, By Players.Additional FeaturesBarrel: 2 5/8"Certifications: Certified with industry standard BPF 1.15 test.