Our 5A with a dense material in the butt end. Kinetic energy is a function of mass and speed. By adding a more dense material to the butt end, these sticks can be played longer and harder with less fatigue. They can also help you play faster!.
5B profile with a dense material in the butt end of the stick
Allows for longer, harder, faster playing with less fatigue than a traditional stick
 
SPECS
Diameter : .565" | 1.44cm
Length : 16" | 40.64cm
Taper  : Medium