F.A. Uebel 740 B- Bass Clarinet Tief C, Bb Bass Clarinet, German system, Tuned in Bb, Tuning slide in the neck, Grenadilla (dalbergia melanoxylon), 4 Thumb keys down to the low C, B1 Mechanics with 2 automatically changing duodecime keys, 4 Trills at the upper joint, Forked Bb and F mechanics, Double C and F keys, F Lever, B C# Trill keys, Adjustable thumb holder with ring for carrying strap, Neck, bell and keys silver-plated, Incl. BAM case and F.A. Uebel mouthpiece