Vandoren CM333 B40 is a mouthpiece designed for alto clarinet. It is part of the Vandoren traditional series mouthpieces and is known for its warm and centered tone. The B40 facing is a popular choice among clarinetists and is known for its balanced response and flexibility, making it suitable for a wide range of playing styles and genres.

The mouthpiece is made of high-quality hard rubber, which is a durable material that can withstand the demands of regular playing. It features a medium-long facing and a 1,38 mm tip opening, which is considered medium in size. The mouthpiece also has a medium chamber, which contributes to its warm and focused sound.

Overall, the Vandoren CM333 B40 is a reliable and versatile mouthpiece option for alto clarinet players who value a balanced and warm tone.