47 minute (23:43 per side), tabs out, HiFi Ferro Type 1 audio tape in violet tint green cassettes, with shiny silver labels applied.
52 to 54 minute (26+ minutes per side) normal bias ferro tape in an old-school grungy off-white Type 1 shell, tabs OUT, 5 screws. 1990s vintage cassettes, mediocre quality tape for a distortion effect.
54 minute (27 minutes per side), tabs out, HiFi Ferro Type 1 audio tape in recycled purple 249 swirl cassette, with blank white paper labels applied.
29 minutes (14:30 per side) of very high quality (BASF) audio tape in a classic 90s 5-screw cassette shell. These are already printed so you have to put paper labels over them. The music has been erased.
C-15 Matte White Music-Grade Audio Cassette Tapes