Blue tamper evident packaging tape, perforated every 6″, providing positive control of unauthorised tampering with package content, immediately. KTL Blue security tape has a printed message ‘SECURITY’ on the surface of the tape with a hidden message VOID OPENED when removed. This tape can be used just like normal packing tape but will leave a clear visible warning for quick detection of attempted theft or attack. Roll length 50m. Roll width 50.8mm.