Demo Selmer B16 Prologue Intermediate Bb Clarinet Key: Bb Universal pitch: 440-442 Hz Standard N1 Boehm system (17 keys, 6 rings/ 18 keys, 6 rings) Wood: grenadilla Polycylindrical bore (cylindrical part: 14.6 mm) Silver-plated rings Barrel: 64.5 mm Valentino pads Nickel-silver plated keywork Ergonomic thumb rest Ergonomic register key Ergonomic tone hole insert for the D / G tone hole Prologue backpack case