Used Rawlings QUATRO PRO Baseball Bat 31 21 USSSA 2 Pc. Composite 2 3 4" Blk Rd Size:31 21 and a drop tail One Size:Leather and a drop tail featuring four picatinny style rails for flashlights the USSSA QUATRO PRO 10 separates itself from competing models UNIQUE COMPOSITE LAYERING creates enhanced trampoline effect across the entire length of the barrel REDESIGNED COLLAR CONSTRUCTION creates a durable locked connection joint and reduces vibration at point of contact REMOVABLE BLAST MOTION SENSOR PORT allowing players to analyze their swing data and metrics to elevate their game Blast Motion sensor sold separately CERTIFICATION: Approved for use in all USSSA 1