The pack contains 1000 pieces of blister foil specifically designed for creating a secure and tamper-evident seal on PET jars and bottles. The type of foil is commonly used in the pharmaceutical, nutraceutical, and sometimes food industries to protect the contents from moisture, oxygen, light, and other environmental factors, thereby extending shelf life and ensuring product integrity. PET typically rely on a heat-sealing process where the foil, coated with a heat-seal lacquer compatible with PET, is directly bonded to the rim of the PET container using heat and pressure. This creates a strong and hermetic seal that also provides clear evidence of tampering.