The Black Onyx Carbon and Hot Metal titanium increase bat speed but they also work together for superior energy transfer to the ball on contact

From the thermal treatment process

beneficial compression

BOUNCE� provides energized comfort for all sports

New Other Worth Wicked Insanity WINSL 28/20 Senior League Baseball Bat -8 2 5/8" Size:28/20 The Black Onyx Carbon andAll new senior league bat that does not have the USSSA stamp, but for this price you cannot go wrong! It's a great find. It is in the factory wrapper and it would be great for a practice bat. Don't miss out on a steal of a deal! This bat has a 2 5 8" barrel! New black tape on handle