Double cone rubber stopper is a versatile tool that is widely used in various fields including chemical, medical and food industries. It is made of high quality rubber material that provides excellent sealing and durability. The double-cone shape allows the plug to be easily inserted and removed, and provides a reliable seal to a variety of holes and containers. This stopper can be used to block the passage of air, liquid or other substances, and also to maintain the temperature and freshness of food.