Louisville Slugger 2014 Diva 11.5 Fastpitch Bat The Divas alloy construction and 2 1/4 barrel give it a sturdy construction and more power at the plate with every swing. The Diva is inspired by the same technologies that fuel some of the best bats in Fastpitch. Bat Specifications Drop: 11.5 Fastpitch Bat Barrel: 2 1/4" Construction: Alloy Certification: ASA, USSSA, ISA, ISF and NSA approved Available Sizes: 27in 15.5oz,28in 16.50z,29in 17.5oz,30in 18.5oz,31in 19.5oz