Remember these weird plastic frames that cassettes came with? Supposed to be anti-theft devices I think, but I always called them the tape-hangars. : r/80s
Anti tampering & theft tape | Seal King Europe
Tamper Evident Security Tape
High Security Tamper Evident Proof Anti Theft Void Tape Label Plastic Tape - China Security Tape, Safety Security Tape | Made-in-China.com