MPPA3M3 Yamaha Mouthpiece Patch M Size 0.3mm Please apply to the mouthpiece of clarinets and saxophones. It stabilizes the embouchure and prevents wear on the mouthpiece. Set of 3 Contents: 6 sheets Size: M Thickness: 0.3mm Applicable mouthpieces: B♭/A clarinet, alto clarinet, bass clarinet, alto saxophone, tenor saxophone, baritone saxophone, alto Venova Feel: Standard thickness