A beautifully preserved sealed dead-stock lot of high-grade Type IV metal position blank cassette tapes. This series was designed for demanding audio recording, especially for CD, digital sources and reference-quality use. It features a rigid duplex cassette mechanism, combining high-density plastic with a transparent panel to help suppress unwanted vibration inside the cassette deck. The result was a cassette made for stable tape travel and clear, precise sound reproduction. The outer shrink wrap remains unopened and intact, with no visible scuffs, tears or damage. The tapes are unused and have been carefully kept in excellent collector condition. A strong addition for collectors of premium Japanese blank media, vintage cassette enthusiasts, or anyone looking for sealed metal tapes from the golden age of analog recording. Please note that these are vintage sealed items. As they remain unopened, they have not been test-recorded or played. The lot will be carefully packed to ensure safe delivery and shipped with full tracking. Customs duties, import taxes, VAT, handling fees, or any other charges required by the destination country are the responsibility of the buyer.