The R13 Greenline series of clarinets follows the same manufacturing process as the 100% grenadlla R13s. Thanks to the addition of carbon fibers, Green Line clarinets withstand admirably to variations in atmospheric conditions (temperature, humidity). The risk of cracking is therefore eliminated. Created in 1994, the Greenline series of instruments has taken advantage of the excess wood remaining from the clarinet manufacturing process. This process of combining grenadilla powder with carbon fibers produces a clarinet that is greatly resistant to environmental change and helps to relieve stress on the African grenadilla wood population.