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.  
 
Pro-Tapered Carbon Composite Handle: Added top-hand control and ergonomic fit for comfort
Ringless Barrel Design: Multi-variable wall thickness, creating a thinner, more flexible sweet spot for unmatched performance
Two-Piece Aluminum Hybrid: Featuring a double-banded, vibration-reducing, 2SIX threaded connection
End-Loaded Design: Added mass built into the barrel for maximum energy transfer and a higher M.O.I.
Micro-Perforated Soft-Touch Grip: Extra track, improving feel and control