This pack of four Sony Microcassette Audio Tapes offers a total of 90 minutes of recordable time. The tapes come in three sizes: 1-60 minutes, 1-30 minutes, and 6MC90L. All tapes are suitable for use with Sony MC-90 models and feature high-quality recording capabilities. These blank audio/video media tapes are perfect for recording your favorite music, podcasts, or any other audio content. They are compatible with a wide range of devices and are an essential addition to any home audio setup. Get started on your next recording project today with this pack of Sony Microcassette Audio Tapes.