This reed is designed to produce a quality of extremely pure sound due to:

a very thin reed tip (the area of reed with maximum vibration),  being balanced by a solid vertebral column (more cane in the area which climbs gradually to the heel).
These reeds are recognizable by a straight line to delineate the limit of the area of bark. 

Suitable for all saxophones and in a large choice of strengths:

The favorite reed of classic saxophonists worldwide since Marcel MULE, it has always been (and is still) used with equal success by many players.