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