Specification Brand : Ks-Tek BulletPoint1 : Great for liquid culture, BRF Jars, injection, Supplemented substrate jars, Grain Masters BulletPoint2 : Excellent Heat Stability (Butyl Rubber)-----Can be sterilized by steam under high pressure. BulletPoint3 : Self Healing Rubber Stoppers----Can create a great solid seal. BulletPoint4 : It is reusable and not out of shape. BulletPoint5 : Used for 13mm glass vial and liquid culture jars, fit about 7mm diameter opening(Please refer to the picture). Color : 13 Grey 200pcs ExternallyAssignedProductIdentifier1 : 0718225083264 ExternallyAssignedProductIdentifier2 : 718225083264 ItemName : 13mm Vial Rubber Stoppers 200Pcs,Mushroom Self Healing Injection Ports Solid Seal,for Glass Vial and Liquid Culture Jars,Can Be Sterilized by Steam and Repeated Used,Butyl Stoppers by Ks-Tek,grey ItemPackageDimensions_Height : 8.8 centimeters ItemPackageDimensions_Length : 4.8 centimeters ItemPackageDimensions_Width : 8.2 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : science-lab-rubber-stoppers Manufacturer : Ks-Tek ModelNumber : 6-337-06 NumberOfItems : 200 PartNumber : KSUSBS-13-200M ProductDescription : These Vial Rubber Stoppers are your best tools to seal bottles, jars, and test tubes! Features: Material: Butyl Rubber Size: Please refer to the picture Quantity: 200 Weight: 1g each Durable, washable ProductSiteLaunchDate : 2021-01-15T06:58:05.997Z SupplierDeclaredDgHzRegulation : not_applicable