... strip 165*4 mm double sided strip. EM strip:security strip, EM strip, barcode strip, used for library,schools, drugstores. ... .Size: 165*4mm, 125*4mm.1) Compatible with all EM systems, such as 3M, Dialoc, Certus, Checkpoint.2) Cobalt-based strip ... labels according to customers requiements from length, usage and so on. em security strip em anti-theft strip em magnet strip