90 min audio cassette, based on legendary SM900 formula
• Width: 3,81mm
• Length: 131m
• Recording time: 90min max
• Clear 5-screws tabs-in RTM cassette
• Base film: Polyester
• Base film thickness: 8 µm
• Coating thickness: 5 µm
• Total thickness: 13 µm
• Coercivity: 370 Oe
• Saturation retentivity: 1480 G
• Oxide: Fe2O3