Marucci 2017 CAT 7 Senior League Baseball Bat (-8) MSBYC78. The all NEW Marucci CAT 7 has a sweet spot double the size of the Cat 6. With it's new precision-balanced one piece alloy barrel design, the CAT 7 has a clean consistent feel.
The difference between the Marucci CAT 8 -10 USSSA Baseball Bat: MSBC810 and the Marucci CAT 8 -8 USSSA Baseball Bat: MSBC88 is the drop weight of the bat. The drop weight is the length to weight ratio of the bat. The MSBC810 features a -10 length to weight ratio so sizes will be 27" 17oz, 29" 19oz and so on.