Audio Cassette/tape 1)blank,30min,45min,60min,90min 2) Dimensions: 142 x 124 x 10.4mm 3) Colors: black, transparent, Audio Cassette /tape1)blank,30min,45min,60min,90min2) Dimensions: 142 x 124 x 10.4mm 3) Colors: black, transparent, or as need Audio Cassette / tape