Micro Audio Cassette, 90 Minutes (45 x 2) / This micro audio cassette provides consistent, reliable performance in telephone answering machines and microcassette recorders. Strengthened, high quality ferric oxide tape provides maximum durability and excellent audio clarity. Designed to withstand repeated recording and frequent playbacks. Cassette Type: Audio; Cassette Size: NA; Grade/Quality:NA; Maximum Recording Time: 90 Minutes (45 x 2).