Corks are rubber

It is used for sealing various laboratory glassware

The product is made of rubber, resistant to non-concentrated acids and non-oxidizing liquids, does not allow water and gases to pass through. The rubber stopper is a standard laboratory accessory that is useful for sealing glassware. Suitable for flasks, vials, flasks and jars with a relatively wide mouth. Due to its height and diameter, the cork can be used with several standard sizes of vessels. It can be used to seal vessels with a ground and smooth neck, glass, plastic, metal. The product is made of rubber resistant to non-concentrated acids and non-oxidizing liquids, does not allow water and gases to pass through.

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