The main features are "easy to produce a thick sound with a light blowing feel, and easy to play from low to high notes." Materials: Danzi Ovidio, Rieger, Medir, Lavoro Type: Rieger Thunemann Red and White Overall Length: Approximately 55.5mm Vibrating Part: Approximately 28mm Tube: Approximately 27.5mm Resistance: Medium Density: 70-75 The maker personally tests and selects reeds of a quality suitable for use in concerts, and creates them one by one with care from round stock for sale. Please give them a try!