Size #54 Natural Jar Corks are professionally crafted tapered corks designed to securely close wide-diameter openings, such as jars. Constructed from 100% natural cork, these corks are created to meet exact specifications. Wholesale quantities are available in bulk. Size #54 Natural Jar Corks are tapered cork used as closures for jars and wide diameter openings. Made from 100% natural cork. Size #54 Jar Corks are manufactured to exacting standards to provide a secure fit. Bulk available. Size #54 Natural Jar Corks provide an airtight seal to preserve the freshness of the contents inside the jar and ensure a secure closure. With proper storage, these corks can be used for multiple applications.