This cap has a sleek black design crafted from durable PP plastic, featuring a ribbed skirt and a 38-400 size with a foam liner. The integrated foam liner ensures an airtight seal upon securely screwing the lid onto the container. Constructed from polypropylene (PP), this lid boasts exceptional heat tolerance and resistance to fatigue. Designed to fit containers with a 38-400 neck finish, where the first number denotes the container opening's diameter in millimeters, and the second number specifies the closure's skirt thread/style/depth.