Specification Brand : Ks-Tek BulletPoint1 : Various Usages:suitable for kitchen, laboratory, hospital, etc.Great for liquid culture, injection ,refill tanks and grain masterbatches BulletPoint2 : Perfect seal: resistant to high temperature and washable, creating a great seal that extends the life of the material in the bottle BulletPoint3 : Easy to use: no need to remove the glue plug, you can inject the culture with the injection needle BulletPoint4 : Size:used for 20mm glass vial and liquid culture jars, fit about 13mm diameter opening BulletPoint5 : Material:made of high quality Butyl rubber material, durable, washable and reusable Color : 20 Red 100pcs ExternallyAssignedProductIdentifier1 : 0732456021857 ExternallyAssignedProductIdentifier2 : 732456021857 ItemName : Ks-Tek 100Pcs 20mm Self Healing Injection Ports(Red), vials Rubber stoppers, Butyl Cap for Glass Bottle and Mushroom Liquid Culture Mason Jars Lid, 20 Red 100Pcs ItemPackageDimensions_Height : 8.7884 centimeters ItemPackageDimensions_Length : 6.4008 centimeters ItemPackageDimensions_Width : 8.3058 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : science-lab-rubber-stoppers Manufacturer : Ks-Tek Material : neoprene ModelNumber : CH0321D NumberOfItems : 100 PartNumber : KSUS-STOPPER-RED-20M ProductDescription : Size:20mm Red(100pcs) Material: Butyl Rubber Size: 20mm0.787in Quantity: 100 Weight: 2g each Color:Red Application: 1.These stoppers can be used to make selfhealing injection ports in Mason jar lids or medicine bottles. 2.Mainly used for mushroom growing and liquid culture production. 3.Use with hypodermic needles to inject cultures, therefore eliminating the need to remove the lids on your culture jars. 4.They fit 13 mm (0.5118) diameter opening. They are 34 across the top, and 516 top to bottom. Simply use a 716 to 12 inch drill bit and drill a hole in metal or plastic jar lid and the stoppers pop right in place. ProductSiteLaunchDate : 2021-03-03T05:30:30.582Z Size : QTY 1 SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredDgHzRegulation1 : not_applicable SupplierDeclaredDgHzRegulation2 : not_applicable SupplierDeclaredDgHzRegulation3 : not_applicable SupplierDeclaredDgHzRegulation4 : not_applicable SupplierDeclaredDgHzRegulation5 : not_applicable