13mm Injection Ports Vials Rubber Stoppers Mason Jar Lids Self Healing Butyl Stopper for Glass Bottle& Liquid Culture Production Jars 100Pcs/Pack by Biomed Scientific

• Material:made of high quality Butyl rubber material, durable, washable and reusable
• Easy to use: no need to remove the glue plug, you can inject the culture with the injection needle
• Perfect seal: resistant to high temperature and washable, creating a great seal that extends the life of the material in the bottle
• Various Usages:suitable for kitchen, laboratory, hospital, etc.Great for liquid culture, injection ,refill tanks and grain masterbatches

Material: Butyl Rubber Size: 13mm/1/4 inch Quantity: 100 Weight: 2g each Application: 1.These stoppers can be used to make self-healing 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 7 mm diameter opening.