Clarinet Bb RC have a classic French style filing. These reeds are made on a segment of 3.2mm. Rectified to 2.8 mm. this leaves the scraping in the most vibrant area of the reed and produces a very brilliant sound. The material is stored to age for at least 3 years before its manufacture. Its shallow shoulders have a closed half moon shape. This helps to maintain the tuning despite being an extremely flexible and spontaneous cane.