20/400 Black Smooth Straight PP Cap / PS Liner

The format can serve cosmetics, personal care, wellness, supplements, household, and specialty products. The 20/400 designation should be verified dimensionally because nominal finish names do not guarantee identical sealing behavior. Packaging engineers can assess Part 138320, the 20/400 Black Smooth Straight PP Cap / PS Liner, against the product, process, and presentation requirements of the program. Qualification should cover thread engagement, liner compatibility, line application, and expected storage conditions.