The TDK SA 90 High Bias Type II Audio Cassette Tapes are a pack of 10 sealed in a brick, perfect for recording audio. With a capacity of 90 minutes per tape, these cassette tapes are ideal for preserving music, speeches, or any other audio recordings. The high bias Type II cassette tapes, featuring a jewel case packaging, are designed to provide superior sound quality and durability for your audio recording needs.