The Yamaha 4C Bass Clarinet Mouthpiece is a well-built mouthpiece perfect for professionals and beginners alike. Similar to other mouthpieces from Yamaha the 4C is made from high-quality phenol resin and features design characteristics of Yamahas professional custom series of mouthpieces. The 4C bass clarinet mouthpiece features a shorter facing than the professional custom series making it easier for beginners to produce a beautiful tone across all octaves.