The Yanagisawa Ebonite Alto Saxophone Mouthpiece Size 5 is a high-quality mouthpiece designed specifically for alto saxophones. Made in Japan by the renowned brand Yanagisawa, this mouthpiece weighs 0.625 and is known for its rich and dark sound. It is a popular choice among professional musicians and jazz enthusiasts looking for a reliable and durable mouthpiece that offers excellent tone quality. This one came with the sax when I bought it but never use because I only play my metal mouthpiece. Thank you for looking.