New Marucci CAT9 USSSA Senior League Baseball Bat, 2 3 4" 30 20 Blue Red Size:30 20 neoprene gusset accommodates most calf Bat Specs 2 5 neoprene gusset accommodates most calf sizes The 2020 Proven is a 1 piece bat built with high performance C1C composite and was designed to minimize negative vibrations and increase the trampoline off the barrel and balanced feel for precision and control more forgiveness and more performance while maintaining the same strength as its predecessor Multi variable wall design creates an expanded sweet spot and thinner barrel walls that are more forgiving after off centered contact Ring free barrel construction allows for more barrel flex and increases performance with no "dead" spots Precision balanced barrel results in a lower M