Rubber Cork (Extra Soft) is a high-quality laboratory stopper used for sealing test tubes, flasks, bottles, and other laboratory glassware. Made from superior grade soft rubber, it provides an excellent airtight and leak-proof seal, making it ideal for various laboratory and industrial applications. The extra soft material ensures easy insertion and removal without damaging the glassware. It also provides flexibility and a tight fit in different types of laboratory containers. These corks are chemically resistant, durable, and reusable, ensuring long service life under normal laboratory conditions.