Varo Baseball is the On-Field Supplier of Major League Baseball, and Official Bat Weights of the USA Baseball National Teams. The ARC 12oz bat weight distributes weight to the end of the barrel, creating a game-like swing that improves a player's mechanics and strengthens baseball-specific muscles. Designed to dial-in your swing before stepping up to the plate, and for off-field conditioning when away from the game. Cushion-Fit Technology, with rubber infused fins eliminate abrasion on the bat, safeguarding the barrel from rings and scratches. The ARC provides optimal performance for all skill levels, from Youth to Pro. Sizing: ARC 12oz (Small) fits 2 1/4" barrel bats; ARC 12oz (Regular) fits 2 3/4" & 2 5/8" barrel bats. Made in USA. Patented.