Choose your length and weight!  Bat weights are determined by a Drop system.  To determine the bats weight, take the bat's length and subtract the bat's Drop rating.  Ex. A 31" drop 8 (-8) bat would weigh 23oz.  (31-8=23).  Generally speaking, 8u through 12u uses Drop 10 (-10) bats.  13u uses drop 8 (-8) bats and 14u uses drop 5 (-5) bats.  High School and above uses BBCOR drop 3 (-3) bats.
 
Some bat length/weight combinations are more readily available and can be received within 2-3 business days.  Others, due to being less common combinations, may take 3-5 days due to coming direct from the manufacturer.  
 
You asked for it and Marucci has once again delivered. The Marucci CatX Connect has been redesigned and features a completely re-shaped barrel profile that provides a slightly more balanced feel (on average a .5 inch lower balance point) while also providing a larger sweet spot and better performing barrel. The CATX Connect senior league boasts a robust 2 3/4 inch barrel the maximum amount allowed. The new S-40 composite handle up to 10% stiffer than previous handle on the CAT9 Connect to allow for a quicker energy transfer at the point of contact. The Marucci CATX Connect is designed by ball players for ball players and ready to perform on every swing.