Feature 1Made of premium silicone, non-toxic, safe and available for long service life. 2Flip top bottle gasket for GROLSCH flip top beverage bottles. 3High quality, it will not deform, crack, or leak. 4Soft and pliable that you can easy to remove and replace. 5Great seals for brewing home-made beer.SpecificationFeatures: Made of premium silicone, non-toxic, safe and available for long service life. Flip top bottle gasket for GROLSCH flip top beverage bottles. High quality, it will not deform, crack, or leak. Soft and pliable that you can easy to remove and replace. Great seals for brewing home-made beer. Specifications: Condition: 100% New Material: Silicone Color: Red Package List: 25 * Silicone Gaskets