... Security Strips, Double SidedExtra-long liner for quicker and easier applicationDouble-sided 5" EM security strip for ... library materialsStrips fit deeply into gutter, impossible to find and removeCompatible with 3M, Gateway, Dialoc or other EM ... paperback books, journals, periodicals and magazinesDeactivable/Non-deactivablePacking: 1,000pcs/box HOT EM strip em anti-theft strip em magnet strip