





🧪 Seal the deal with every injection—precision meets durability!
These 20mm mushroom-shaped rubber stoppers provide a self-healing, airtight seal for glass vials and liquid culture jars. Made from heat-stable butyl rubber, they can be steam sterilized repeatedly without deformation. Designed for a precise fit on 13mm openings, each stopper supports multiple injections, making them a cost-effective and reliable choice for lab and cultivation use.

| Customer Reviews | 4.6 out of 5 stars 429 Reviews |
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