Kruspe style horn with large throat for full sound with little resistance. Available with an attached bell (668II/NII) or made of nickel-silver (668NII/668NDII).
- Level: Professional Double
- Key: F/ Bb
- Style: Kruspe
- Bore: 0.472"
- Bell Diameter: 12 1/8"
- Bell throat: Large
- Leadpipe Material: Gold Brass
- Body/Bell Material: Yellow Brass; Nickel (YHR-668NII)
- Bell Type: Fixed; Detachable (YHR-668DII/NDII)
- Finish: Clear Epoxy Lacquer; Nickel-plating (YHR-668NII)
- Mouthpiece: 30D4
- Rotors: (4) Solid
- Rotor Casing: Nickel silver
- Lever Action: String
- Water Key: Yes
- Features: Adjustable thumb lever; Longer leadpipe taper;Larger bell taper
