Tip opening: .055". Facing length: 20mm. Chamber: Large. 
 
Designed by Arnold Brilhart, the Graftonite line of Bb Clarinet mouthpieces incorporate revolutionary materials so students can achieve easier tone production at an affordable price.
IDEAL FOR: 
EDUCATIONAL/SCHOOL MUSIC
 
Designed by Arnold Brilhart, the Graftonite line of Alto mouthpieces incorporate revolutionary materials so students can achieve easier tone production at an affordable price. 
PRODUCT FEATURES
Material: Plastic
All D’Addario Woodwinds rubber mouthpieces are designed and manufactured in the USA