These are crystal clear poly boxes for audio cassettes.
C-88 (44:00 per side) in a red tint transparent sonic cassette shell, frost leader tape, tabs-out , loaded with hi-fi tape.
C-53 (26:30 per side) in a smoke tint cassette shell, tabs out , clear leader, loaded with hi-fi tape.
C-53 (26:30 per side) in a florescent pink transparent sonic cassette shell, clear liners, clear leader ,tabs-out , loaded with hi-fi tape.