Made with a combination of maple and bamboo, the BamBooBat(R) Hybrid Series bats features a proprietary mix of different types of bamboo to create a very durable and weight appropriate bat for players ages 13 years old to adult. Value and Performance: Proprietary mix high-quality bamboo, maple and composite to ensure maximum strength Includes a blend of maple wood for added surface hardness and stiffness on contact Balanced 271 turn model Flared knob with cupped end Rubberized handle Approximate -2 To -3 Length To Weight Ratio Manufacturer's Warranty: 100 days NOTICE : We recommend that you receive approval from your local league before removing the wrapper from your bat.