Features Smaller C, C#, D & E tonehole diameters for better intonationNew smaller cup diameter for better response and resonanceCustom handmade G3 neck improves intonationImproved key and hook placement for greater comfortRedesigned left-hand pinky keys provide extraordinary comfort and quick responseAdjustable thumb restRefined key shape and dimension improve overall playability Description Product Description Key of Bb. French brass body, bell, and neck; handmade G3 neck, yellow brass keys; mother of pearl key buttons; drawn tone holes; Front F and high F# keys; blue steel springs; waterproof leather and wool felt pads with plastic tone boosters; adjustable thumb hook; ribbed and flanged mounting; hand-engraved bell. Includes case.