Reebok Vector O Adult Bat BESR Ceritified, 2-5/8-Inch diameter barrel and -3 length to weight ratio O-Technology reduces drag through the entire swing pattern providing increased swing speed compared to more tradtional bat designs. Designed with patent pending, TLS Connection Technology System Engineered with the Reebok VR950 Alloy/Composite Performance Matrix offering unequalled power and performance. Equipped with an extended barrel profile, maximizing the hitting area.