- RZ Clarinets Bohema Hybrid Bb-Clarinet 18/6; Bb-Clarinet (Boehm-System); professional model; 18 keys; 6 rings; leather pads; adjustable thumb rest; silver plated keys; gold plated pillars; RZ traditional and innovative production (Czech) + Magoo technology and material (Swiss); new high professional RZ MM progress 21 polycylindrical bore; Hybrid body construction (2 different materials) effects warmer sound, easier blowing, better resonance, lighter articulation and more stable intonation; upper joint, low joint, barrel outside: naturally seasoned cocobolo wood (unstained finish); upper joint, low joint, barrel inside: composite (brass + resine); bell: naturally seasoned cocobolo wood, unstained finish with the composite (brass + resine) resonance ring; inserts grenadilla tone holes slot on the upper & low joint; incl. 2 barrels (63mm and 64mm), RZ luxury case, RZ cleaning set, without mouthpiece