The Standard Series are made of high-quality phenol resin (plastic) and feature a design based on the top-grade Custom Series. They are extremely consistent in specifications and playing quality and offer excellent value for their price. The facing of this series is slightly shorter than that of the Custom Series, making them easier to play, and easier for beginning students to achieve a rich characteristic clarinet sound. 
The 4C helps obtain a well-balanced tone over all octaves for professionals and beginners alike.
 
The Yamaha 5C Bb Clarinet Mouthpiece facilitates a richer, fuller volume than 4C, with a greater tonal variety. The Standard Series are made out of high-quality phenol resin (plastic) and feature a design based upon the top grade Custom Series. They are extremely consistent in specifications and playing quality, and offer excellent value for their price. The facing of this series is slightly shorter than that of the Custom Series making them easier to play, and easier for beginning students to achieve a rich characteristic clarinet sound. They also are available in a variety of sizes, to suit the needs players of many different styles.