D5004 MC-60 Telephone Microcassette Tape for Dictation and answering machines 30 to 60 minutes per side when recorded slow speed. Time on Answer machines varies - Walmart.com
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MC Hammer Have You Seen Her Cassette Tape Single Rap Hip-hop - Etsy
Amazon.com: Reshow Dictating Microcassette - Micro Cassette Tapes Blank for Recording MC-60 Minutes Suited for Lectures and Seminars -3 Pack : Electronics
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MC-60 Micro Cassette Recording Tapes For Recorders/Answering Machine | eBay