Combat Lisa Fernandez Light-12 Fastpitch Bat The single-wall barrel composite construction allows for longer barrel lengths and lighter bats, resulting in maximum allowable performance. The bat has BFT (blended fiber technology) that allows the bat to reach maximum performance. The bat meets the l.20 BPF for USSSA and ASA fastpitch approval. The barrel is 2 1/4" in diameter. The fastpitch bat is 30", weighs 18 oz., and has a 10.5" barrel length.