Morgan Excalibur tenor saxophone mouthpieces are made from the finest pure hard rubber. The mouthpiece rubber's formula is exclusive to the Morgan Company and is the same formula used by top mouthpiece makers from the 1920s to the 1950s. It is made solely from rubber with no synthetic additives. Excalibur saxophone mouthpieces feature a round chamber with a smooth rollover baffle. They have a long S-curved roof to produce that pop you want without sharpness in the palm keys. Excalibur sax mouthpieces have an even response from low Bb to as high as you want. It has a compact, centered, brilliant sound with maximum control and flexibility.