Jean Baptiste is now proud to offer high quality plastic mouthpieces for trumpet trombone bass trombone (large shank) and tuba. These mouthpieces are durable affordable waterproof easy to play on! Jean Baptiste plastic mouthpieces are perfect for players who may be sensitive to silver or nickel or for marching band musicians and outdoor performers. Available in black or clear finish pick one up today!Available cup sizes:Trumpet: 3C 5C and 7CTrombone/Bass Trombone: 6 1/2 ALTuba: 24AW