Specification Brand : uxcell BulletPoint1 : Bottom Diameter(small-end): 9mm / 0.35-inch; Top Diameter(big-end): 13mm / 0.51-inch; Body Height: 27mm / 1.06-inch; Package Content: 6 x Rubber Stoppers. Please note that these silicone stoppers are designed for laboratory use and are not suitable for food-related applications BulletPoint2 : Foam Silicone Stoppers: Made of silicone, flexible and durable, with good resistance to chemicals, acid, and alkali resistance, high-temperature resistance, will not dissolve and swell in acidic liquids BulletPoint3 : Great Fit and No More Drips: Good insulation and sealing performance. Silicone stoppers come in a variety of sizes, ensuring a snug fit for any bottle, glassware BulletPoint4 : Tapered Design: The tapered shape allows for a secure push-in fit into holes and openings of different sizes. Push the stopper into the desired opening for an instant, leak-proof seal BulletPoint5 : Versatility Used: Whether you are sealing your reagent bottles, glassware, or industrial use, silicone stoppers have got you covered. They are the multi-purpose sealing solution for lab experiments and DIY projects Color : White ExteriorFinish : Silicone ExternallyAssignedProductIdentifier1 : 762047825328 ExternallyAssignedProductIdentifier2 : 0762047825328 GpsrSafetyAttestation : 1 ItemName : uxcell Tapered Shaped Silicone Stoppers 9 to 13mm, 6 Pcs White Tapered Lab Seal Plugs with Hole for Sealing, Test Tubes, Flasks ItemPackageDimensions_Height : 9 centimeters ItemPackageDimensions_Length : 1.7 centimeters ItemPackageDimensions_Width : 6 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : science-lab-rubber-stoppers Manufacturer : uxcell Material : Rubber ModelName : Size 13 Rubber Stoppers ModelNumber : RS-12-1 NumberOfItems : 2 PartNumber : a25031800ux3053 ProductDescription : Description: Foam Silicone Stoppers: Made of silicone, flexible and durable, with good resistance to chemicals, acid, and alkali resistance, high-temperature resistance, will not dissolve and swell in acidic liquids Great Fit and No More Drips: Good insulation and sealing performance. Silicone stoppers come in a variety of sizes, ensuring a snug fit for any bottle, glassware Tapered Design: The tapered shape allows for a secure push-in fit into holes and openings of different sizes. Push the stopper into the desired opening for an instant, leak-proof seal Versatility Used: Whether you are sealing your reagent bottles, glassware, or industrial use, silicone stoppers have got you covered. They are the multi-purpose sealing solution for lab experiments and DIY projects