RIP-IT 2014&nbsp;Senior AIR Big Barrel B1410B Baseball Bat (-10) The Contact Grip eliminates vibrations and sting to maximize comfort Made of advanced R2 Alloy material to deliver ultimate durability and power Features an Acoustic Barrel for tremendous pop Legal for 1.15 BPF Senior League Has a barrel diameter of 2 3/4-Inch and a -10 length-to-weight ratio