Continuous thread closure allows you to thread smoothly and seal tightly every time. This 24-410 white polypropylene (PP) plastic continuous thread closure has a ribbed skirt and smooth top. It includes a 0.020 SG75 heat induction seal (HIS) liner innerseal. These closure types are widely used across Liquid products, Food and pharmaceuticals. Note: The SG75 heat induction seal liner provides a tamper-evident air and watertight seal to preserve contents and prevent leaks.