The 25 mm X 85 mm clear shrink bands are available here in a bulk option and fit all of our 4 dram glass vials. These shrink bands give more protection and added safety to products through an effective tamper-evident seal made of 2 mil thick shrinkable PVC plastic. These shrink bands create more protection to the product without being a burden to remove with a single vertical perforation and when paired with our heat gun kit they can be applied very quickly and evenly.