The opinion of the Vandoren experts:

The time-proven standard for musicians.

Opening:  110.5
1/100 mm 

Facing length:  Medium

Instrument:  E-flat Clarinet

Series:  Traditional clarinet mouthpieces

We offer a 7 day approval period as of the day received.
If you are not happy with your purchase for any reason, let us know within 7 days of receiving, return it for a full refund less freight costs.

With the same tip opening:

    long facing = stronger reed
    short facing = softer reed.

With the same facing:

    open mouthpiece = softer reed
    closed mouthpiece = stronger reed.