43/400 White Smooth Straight PP Cap / PS Liner

The 43/400 designation should be verified dimensionally because nominal finish names do not guarantee identical sealing behavior. The format can serve cosmetics, personal care, wellness, supplements, household, and specialty products. This packaging closure pairs a defined specification with practical manufacturing and consumer-use considerations. Qualification should cover thread engagement, liner compatibility, line application, and expected storage conditions. A thoughtful specification gives operations and brand teams the same target.