24/400 Black Smooth Straight PP Cap / PS Liner

The 24/400 designation should be verified dimensionally because nominal finish names do not guarantee identical sealing behavior. PackagingBuyer Part 138420 identifies the 24/400 Black Smooth Straight PP Cap / PS Liner, a packaging closure worth evaluating for function, presentation, and production fit. It is relevant to cosmetics, personal care, wellness, supplements, household, and specialty products. Qualification should cover thread engagement, liner compatibility, line application, and expected storage conditions.