100Pcs Injection Ports for Jar Lids 7mm (0,5 in) - Grey Butyl Rubber Stopper for Culture Work, Washable & Reusable Lab Rubber Stoppers - Liquid Culture Lids for Long-Term Storage of Any Liquids

I use these in my metal lids on pint and quart canning jars for mushroom liquid culture. They last quite some time and I have used them over and over with success. They would probably last even longer, but I just choose to use new ones. And yes, they can go in the pressure cooker on your jars. A good quantity for a good price.

These have been performing well, I have, however, doubted if they have been truly healing after puncturing because of their price They stay in place and are tough

These work really good and I've been using big liquid culture needles and it even self heals the big holes.

Worked as expected.

As Advertised

Just what I was looking for. Super easy to drill a hole in a jar lid and push it in. Sometimes you need needle nose pliers to pull it tight but still super simple. I'm pleased with these.

These worked great for pressure sterilizing. After stabbing them with 22-16 gauge needles a few times them don’t seem to seal again and lead to contamination so, I recommend replacing them carefully and quickly in front of a flow hood after 2 or 3 pokes. Other than that, they’re great, easy to use and well worth the money.

Not a bad deal. Below the quality one would find on a multidose vial but still acceptable. They work as intended although I'd be cautious to enter more than a few times. Even with bevel up, they tend to core with an 18ga needle. No complaints though and would definitely buy again.