The RolBec Flute is an open-tone-hole duct flute pitched in C4, chromatic 2.5+ octaves on our 10-hole system, with a 3+ octave extended range. Three interchangeable inserts sit in the headjoint shell: mouthpiece insert, windway insert, and edge insert. Each changes a different part of how the sound is produced. Four tuning joints set the pitch standard anywhere from 430-450 Hz/± 40 cents. Manufactured in California with accuracy to ±0.02 mm and material matching the density of fine woods used in Western woodwinds. Finishes: Gray carries the subtle tonal variation inherent to the material and process. Black is uniform and controlled. Black with Gold Accents is hand finished, requiring additional production time with limited capacity. Shipping: Built to order. 3-4 weeks. Warranty: 2-year manufacturer warranty. Return: 30-day from purchase with restocking fee and return shipping. RolBec resources: Fingering Chart, Characteristics Chart, The RolBec Flute Story Terms and Conditions: Shipping, Returns, Cancellation, Warranty Specs: Instrument Open-tone-hole duct flute, two-chamber design Pitch: C4 (concert C at A=440) Range: C4 - G6+ / 2.5+ octaves Extended Range: G6 - C7+ / 3+ octaves Fingering System: 10-hole chromatic system Volume: C4: 90 dB, 105+ dB peak, measured at 1 m Weight: 500g / 1.3 lbs Overall length: 24.7 in Acoustic Design Bore: 30 mm Window: 28 mm Cutting Edge: Curved (following bore contour) Tone Holes: Oblong (equal area opening to a 10.97 mm circular hole) Finger Plates: Raised and Contoured Hand Ergonomics: Tone holes rotated laterally around the bore Headjoint: Tapered Design Headjoint Inserts: Mouthpiece, windway, edge Attachments: Beard (available for purchase) Instrument Ergonomics: Neck bend and neck strap ring Manufacturing: Made in California Tuning Tuning Sections: Four tuning joints Tuning Rings Included: standard configuration 10-10-5-5 mm (range 0-0-0-0 to 20-20-10-10 mm) Adjustable Pitch Standard: A=430-450/±40 cents Materials and manufacture Inserts: resin, accuracy to ±0.02 mm Body: PA12s, accuracy to ±0.2 mm, density 0.95–1.02 g/cm³, isotropic, matching fine woods used in Western woodwinds Capability: Microtonal pitch access and continuous glissandi Color and response changed without changing tuning, by relocating tuning rings between the upper joints Insert Characteristics: color, tone, focus, breathiness, pressure, definition, dynamics, flexibility Included: The RolBec Flute Mouthpiece Insert (Cap) Windway Insert (W1) Edge Insert (E6s L15) Tuning Rings (2 x 10mm, 6 x 5mm, 4 x 2.5mm) Custom Case Neck Strap Cork Grease Microfiber Cleaning Cloth Tenon O-Rings (2 extra)