The 28 mm X 80 mm clear shrink bands are compatible with our 5 ml clear glass vials with white or natural sprayers and will create a tamper evident seal that will improve the safety of the product. These shrink bands are made from shrinkable PVC plastic, are 2 mil thick and display a single vertical perforation that will allow for an easier opening of the band. These perforated shrink bands are simply applied through heat and here at SKS we offer a heat gun kit that will make the whole process even easier.