The product is a lot of 4 Sony HF blank audio cassette tapes with a normal bias and a capacity of 90 minutes each. These recordable tapes come in a standard jewel case packaging and are designed for audio recording purposes. The tapes are manufactured in Thailand and are suitable for use with various audio recording devices. Perfect for recording music, lectures, or any other audio content, these Sony cassette tapes offer a reliable and high-quality option for capturing sound.