This is a Harrison ligature. A2F (Forte) PGP * A2 size fits alto saxophone mouthpieces with a slender profile, such as Selmer and Yamaha. (Meyer mouthpieces are thicker, so A3 is suitable.) * The Forte series has a thick and rich sound. * PGP (Pink Gold Plated), in my opinion, gives a more subdued, softer, and richer tone than gold plating. Please check the photos for discoloration due to aging and consider purchasing with your understanding.