These Morgan jazz tenor saxophone mouthpieces are made from the finest pure hard rubber. The formulation for the rubber is exclusive to the Morgan Company and is the same formula as used by the top mouthpiece makers in the 1920s&ndash1950s, with no synthetic additives.The Morgan jazz tenor mouthpieces are available in two chambers Medium and Large.The Medium chamber has a round chamber with a smooth rollover baffle. It has a long S-curved roof to produce that pop you want without sharpness in the palm keys. It has an even response from low Bb to as high as you want. It has a compact, centered, brilliant sound with maximum control and flexibility.The Large chamber has a larger rounder throat area, producing a warmer, darker, and more soaring sound. A long rollover baffle provides excellent projection and power....