This is the Louisville Slugger Adult Maple professional wood bat. Louisville Slugger uses professional grade, hand-picked Maple to make this bat. The unique grain structure of this wood prevents the barrel from flaking. The M9 Maple is also kiln dried for optimum moisture content. The pro cupped end is ideal for controlling the weight for maximum bat speed and durability. The medium barrel offers one of the best sweet spots possible without compromising durability. Maple Wood bats are a stronger wood than the standard Northern White-Ash models. The strength of the maple bats make them ideal for high school, college, adult, minor leagues, and major leagues. The number of major leaguers using Maple Wood bats has increased each year as their performance and durability have been unmatched. Louisville Slugger: Performance Products for Championship Performances. Free Shipping.