Vintner's Harvest Plastic Top Colmate Corks 29x20mm.
The Colmated (Bellcork) is one of the most popular corks. The Colmated wine cork is made of natural cork and then treated with a colmated process to fill the outer imperfections of the cork. This process combined with the surface treatment gives the Colmated cork improved sealing ability. To learn more about winemaking refer to """"Introduction To Winemaking"""" by Chris Reading.