Profile mouthpieces design provides a round sound, great projection, and immediate response. Profile mouthpieces - A combination of the most famous mouthpiece attributes resulting in unparalleled artistic opportunities. The SP3 makes the instrument elegant and accessible in all registers and offers a consistancy of sound in all dynamics. Tip opening: 111(1/100ths mm) / Facing: Short V12 and V21 reeds are particularly recommended.