These are smooth finish (colmated) corks produced by Youngs's, for use in our wine bottles. The surface has been finished smooth to blind any cavities. They have been sterilised then sealed with a silicone solution so they do not require soaking or boiling before use. Intended for wine which is to be used within 3 years. Corks should be rinsed in sterilising and cleaning solution before use and carefully inserted into the bottle using a lever corker or can be driven home by plastic hand corker. Individual cork 22mm dia x 38mm long, weight 4gms.