(CL515) These synthetic T-Corks are also known as: T-top corks, Bar Top Corks, Tasting Corks or Mushroom Corks. They can be put in wine bottles without a corker of any kind. The T-Corks fit tightly into a standard 750ml wine bottle that has a cork finish or has a ¾ inch opening. A ribbed-plastic grip-top allows for easy insertion and removal. All this adds up to one convenient wine cork. These synthetic T-Corks are high quality and made completely of food-grade materials. They come 30 per package.