Metal cassette tape using super-fine particle, high-performance metal magnetic material. Enables high-quality recording compatible with digital audio sources. - Brand: TDK - Model Name: MA 42 - Type: Metal Position Type IV - Bias: Metal - EQ: 70μs - Position Type: Type IV - Recording Time: 42 minutes (21 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 are not accepted after purchase. It has been stored in a closet at home.