Butyl Rubber Stopper 20mm Pk100pcs

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Material:made of high quality Butyl rubber material, durable, washable and reusable
Size:used for 20mm glass vial and liquid culture jars, fit about 13mm diameter opening
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

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