sshhmute Practice Mute French H. L. BL, Practice Mute for French Horn, Suitable for large bells, Made of ABS plastic with cork seal, Accurate tuning across the entire tuning range, Helps to develop and open the throat muscles and enables better airflow, Minimal blowing resistance, For precise playing in all registers, Weight: 260 g, Dimensions (base width x neck width (including seal) x height): 139 x 72 x 195 mm, Colour: Black / Blue