ST 307:2002 - SMPTE Standard - For Television Digital Recording — 6.35-mm Type D-7 and Type D-12 Component Format — Tape Cassette

This standard specifies the dimensions for three types of 6.35-mm type D-7 and type D-12 tape cassettes (M, L, and EL) for use with digital recorders. — NOTE – The cassette is used for more than a single recording format. The cassette provides no information to indicate the format of the recording contained on the tape within the cassette.