Specification Brand : uxcell BulletPoint1 : Size and Packing of Rubber Seal: Inner Diameter 13 mm/0.5 inch; Outer Diameter 18 mm/2.8 inches; Height 14 mm/0.5 inches.200 pieces of rubber stopper. BulletPoint2 : Material - Made of butyl rubber it has good oil resistance and acid and alkali resistance and can maintain stable performance in high temperatures. it is washable and reusable. It forms a good seal and is suitable for long-term storage of liquids or solids. BulletPoint3 : Application - Our Butyl Rubber Stopper can be used in the laboratory and at home, with a good sealing effect and convenient storage. Suitable for oral liquid bottles, original solution bottles, essential oil bottles, freeze-dried bottles, etc. Suit for oral liquid bottles, original solution bottles, essential oil bottles, freeze-dried bottles, etc. BulletPoint4 : Rubber Bottle Caps - These self-healing stoppers are worth it if you want to seal things, rubber drain stoppers feature an inert coating on the surface that helps better seal the bottle, allowing the contents to be stabilized. BulletPoint5 : How to Use - These rubber caps can be punched with injection holes so that culture media can be injected with an injection needle without removing the rubber stopper. It is more clean and easier to use. Color : Gray IncludedComponents : stopper ItemName : uxcell 13 mm/0.5 inch Vials Rubber Stoppers, 200 Pcs Three Legs Butyl Rubber Bottle Stopper Self-Healing Injection Ports Seal for Glass Vial and Liquid Culture Jars, Grey ItemPackageDimensions_Height : 2.76 inches ItemPackageDimensions_Length : 5.51 inches ItemPackageDimensions_Width : 5.31 inches ItemPackageQuantity : 200 ItemTypeKeyword : science-lab-rubber-stoppers Manufacturer : uxcell Material : Rubber ModelNumber : 45473I6UN717RU17QH0KZA23E NumberOfBoxes : 1 NumberOfItems : 200 NumberOfLithiumMetalCells : 1 PartNumber : a24092000ux0381 ProductDescription : Description Application - Our Butyl Rubber Stopper can be used in the laboratory and at home, with a good sealing effect and convenient storage. Suitable for oral liquid bottles, original solution bottles, essential oil bottles, freeze-dried bottles, etc. Suitable for oral liquid bottles, original solution bottles, essential oil bottles, freeze-dried bottles, etc. Material - Made of butyl rubber it has good oil resistance and acid and alkali resistance and can maintain stable performance in high temperatures. it is washable and reusable. It forms a good seal and is suitable for long-term storage of liquids or solids. How to Use - These rubber caps can be punched with injection holes so that culture media can be injected with an injection needle without removing the rubber stopper. It is more clean and easier to use. Rubber Bottle Caps - These self-healing stoppers are worth it if you want to seal things, rubber drain stoppers feature an inert coating on the surface that helps better seal the bottle, allowing the contents to be stabilized.