The versatile Model H177 offers a compact feel and bright sound. It includes a hand-fitted rotary valve system, string linkage, separate Bb tuning slide, and a change lever designed to fit the thumb in a natural position. Made of extremely corrosion-resistant nickel silver. Key of Bb/F double. .46" bore; 12-1/4" medium-throated, hand-hammered, nickel silver bell; .310" venturi of nickel silver; tapered hand-lapped brass valve rotors; nickel silver branches, bows, and ferrules; solid nickel silver slides.