2 5/8 inch barrel diameter One-piece, AZ105 alloy construction Precision-balanced barrel Approved for play in BBCOR. The CAT8 BBCOR is a one-piece alloy bat built with AZ105 super strength aluminum alloy meaning thinner walls, higher response rate, and better durability. The precision-balanced barrel features a ring-free multi-variable wall design that creates an expanded sweet spot, while the patented AV2 Anti-Vibration knob produces a better feel and less negative feedback. - 2 5/8 inch barrel diameter - One-piece, AZ105 alloy construction - Multi-variable wall design creates an expanded sweet spot - 2nd Generation AV2 Anti-Vibration knob - Ring-free barrel construction - Precision-balanced barrel - Professionally inspired handle - Micro-perforated soft-touch grip - Approved for play in BBCOR - 1 year manufacturer's warranty.