This is a Sony (SONY) "PRA-7-550" open reel audio tape. It is a rare, unopened, shrink-wrapped deadstock item. This is a polyester-based tape without a back coat, making it ideal for music recording and archiving. Specifications: • Manufacturer: SONY (Sony) • Model: PRA-7-550 • Tape Length: 550m • Tape Thickness: 36 microns • Reel Size: 7-inch (approx. 18cm diameter) • Base Material: Polyester • Magnetic Material: Iron Oxide Recording Time Guide (Total Round Trip) • 9.5 cm/sec: 180 minutes • 19 cm/sec: 90 minutes • 38 cm/sec: 45 minutes Condition: Stored in completely unopened condition. The outer shrink wrap (vinyl) is intact and in beautiful condition, but due to long-term storage, there may be slight aging of the packaging. We cannot guarantee the quality of the contents, so please purchase only if you understand that this is a vintage item. Shipping: We will carefully pack it with cushioning material (bubble wrap) and ship it via Rakuraku Mercari anonymous delivery. If you have any questions, please feel free to comment. Instant purchase is also welcome!