Size 15 Extra Select Cork Stoppers are our highest grade tapered corks. Size 15 Extra Select Corks are often used for bottling liquors and spirits. Made from 100% natural and sustainable cork. No minimum order required. Bulk cork stoppers for sale with volume discounts at wholesale prices. WidgetCo products are manufactured to exacting standards to provide a secure fit every time. All stoppers are visually sorted depending on their quality grade determined by the size of the lenticels (crevices) that occur naturally in the cork. Extra Select are the highest grade having smaller and fewer lenticels.