The Buffet R13 Greenline Bb clarinet follows the same manufacturing process as the 100% grenadlla R13s. The Buffet R13 Greenline clarinets are highly popular among military clarinetists or any player who is subjected to extreme conditions. Thanks to the addition of carbon fibers, The Buffet Green Line clarinets withstand to variations in atmospheric conditions (temperature, humidity). Complete with case, and all necessary care products.