This 53 mm PE-Lined Child-Resistant Smooth Sided Cap provides a premium and professional closure for both glass and plastic jars. Its child-resistant function ensures safety and compliance while its smooth texture and appearance add style and a minimalistic touch. The PE liners in these caps also help improve freshness and odor control, creating a seal and barrier. The cap has a 53/400 neck finish designed for containers with a 53mm 'T' dimension, with 1 thread turn (400).