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🧪 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.
| ASIN | B07JGVBSVS |
| Best Sellers Rank | #206,115 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #229 in Lab Rubber Stoppers |
| Date First Available | October 16, 2018 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 6.7 ounces |
| Manufacturer | Chudeng |
| Package Dimensions | 3.35 x 3.23 x 2.52 inches |
C**N
Buy this one
Excellent. Exactly as described. Fits a 15/32 inch hole perfectly. Use a step drill bit for a super easy clean hole in a jar lid. Oreilly sells a kit that includes a step drill bit with the correct size. Best value for money. Excellent durability, I tested one by puncturing it 20 times. As long as you use slightly different spots it lasts easily 10-15 punctures with a 16 gage needle.
J**R
Worked flawlessly.
100% success with zero contaminates. No problems being pressure cooked at 15psi for 90 minutes. The ports can be used multiple times, but they're so cheap I use new ones each time. 100 for $10 is an excellent buy.
J**O
good quality
was very happy with the quality of the product
T**R
Game changers for liquid culture jars
These are game changers for liquid cultures for mushroom cultivation. Super cheap for how easy they make sterile spore and LC transfers.
J**W
Fast shipping and packaged good
Fast shipping product as described and great price. Can’t really complain but made of a harder rubber than the higher quality product vacutainer type. Would buy again in a pinch
D**E
Makes keeping a sterile environment easy
They work great. Be careful when using a hot tool to pierce it. The heat makes the self healing ability non existent.
D**S
The smell and thickness
This product was supposed to be used for gourmet mushroom cultivation, the rubber piece was very thick for my syringe which I felt was not ideal, they also have a very strong rubber smell that I did not appreciate.
N**S
Work good
They last longer then what I use them on. Price is good enough to use once
Trustpilot
4 days ago
5 days ago