The 45 mm X 80 mm clear shrink bands are offered here in a bulk option and are compatible with both 8 oz glass bottles as well as 1 oz plastic round bottles. These shrink bands create a tamper-evident seal that increases the safety level and protection of the product. These shrink bands can be applied easily by using a heat gun, which we offer here at SKS and they are simple to remove as well through a single vertical perforation.