Rawlings 2014 5150 SL5110 Baseball Bat (-10) 5150 alloy formulated for higher strength and increased flex 2 5/8 barrel diameter Approved by USSSA, Babe Ruth, Pony, AABC, Dixie, BPA, Dizzy Dean and other associations that allow 2 5/8 barrels with 1.15 BPF standard