Metal cassette tape using super-fine particle, high-performance metal magnetic material. High-quality recording compatible with digital sound sources is possible. - Brand: TDK - Model Name: MA 74 - Type: Metal Position Type IV - Bias: Metal - EQ: 70μs - Position Type: Type IV - Recording Time: 74 minutes (37 minutes per side) - MOL 315Hz +6.0dB (0dB=250nWb/m) Thank you for viewing. Since this item is unopened, the operation has not been confirmed. Returns after purchase are not accepted. It has been stored in a closet at home.