... : EM strip, book strip, EM label, security strip,EM tag book tail tag security labels: security strip, EM strip, barcode strip. 125mm double sided strip ... as 3M, Dialoc, Certus, Checkpoint.2) Cobalt-based strip, adopt super-thin demagnetizing slice. Good effect of re/demagnetizing.3) Excellent ... anti-metal shield. Options: customized size is available. book tail tag security labels