Now you can custom fit your O-rings for your BEHN™ products! O-ring sets are available for EPIC™ and SONO™ mouthpieces as well as EVO™ Eb bell extensions. 
 
Bb O-rings are available in three sizes: small, medium (standard), large. By default, all Bb mouthpieces are originally optioned with medium O-rings.
 
Bb mouthpiece and Eb extension sets include 3 O-rings and Eb and bass mouthpiece sets include 4 O-rings.