This product is a pack of 4 sealed vintage TDK SA-90 cassette tapes, made in Japan. These IEC TYPE II HIGH capacity (CrO2) cassettes have a total duration of 90 minutes each and come in a sleeve packaging. The cassettes are recordable and ideal for recording audio on a cassette player. They are manufactured by the reputable brand TDK, known for producing high-quality audio products. Perfect for those looking to create their own mixtapes or record audio from a specific source.