Reebok Vector O (-11) Youth Baseball Bat (Silver, 31-Inch/20oz) O-TECHNOLOGY reduces drag through the entire swing pattern providing increased swing speed compared to more traditional bat designs Designed with the patent pending, TLS Connection Technology System Equipped with an extended barrel profile, maximizing the hitting area 2-1/4" diameter barrel with 11 length to weight ratio Comes standard with the Reebok tackified handle grip providing exceptional comfort and control