- Boehm system - Tip opening: 1.05 mm - Was designed and developed together with clarinetist Milan Rericha - Produces a beautiful dark sound with a rich hue - The Umbra mouthpiece sounds darker than the Elite series and has a lower resistance, which is very rare to find in a clarinet mouthpiece - Handmade from authentic Chedeville rubber EUR 333.00 - See more - Buy online