This new inovative design Black Diamond Model barrel by clarinetist Philip Muncy has been a smashing hit. Special synthetic material that is very stable in all temperature and humidity conditions is perfect for every climate. Unique bore that is very dark, responsive, with a tremendous dynamic range. Ease of playing in the softest passages and a big sound that holds shape in the loudest fff. Available in lengths 63-67mm for Bb & A clarinets.