28/400 Black Smooth Straight PP Cap / PS Liner

The 28/400 designation should be verified dimensionally because nominal finish names do not guarantee identical sealing behavior. The commercial value of this packaging closure depends on disciplined component integration. It may fit briefs involving cosmetics, personal care, wellness, supplements, household, and specialty products. Confirm thread fit, torque, liner performance, leakage resistance, and opening behavior on production containers. The objective is a package that feels intentional at every point of use.