(Lot Of 7) New Sealed Sony HF High Fidelity Normal Bias Cassette Tape 90 Minutes

(Lot Of 7) New Sealed Sony HF High Fidelity Normal Bias Cassette Tape 90 Minutes. The image shows a Sony HF 90 High Fidelity Normal Bias Audio Cassette, a type of blank cassette tape designed for recording.
Here's some information about this product:
Type and Bias: It's a Type I, normal bias cassette, which means it uses a standard ferric oxide tape formulation and requires a specific bias setting on your cassette deck for optimal recording. Recording Capacity:
The "90" indicates it has a 90-minute recording capacity, meaning 45 minutes per side. High Fidelity: The "High Fidelity" designation suggests it was designed for good audio quality for its type, comparable to other well-regarded Type I tapes like TDK D or Maxell UR. Availability: These tapes are no longer manufactured.