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

Works as advertised. Nice fit and never any contamination.

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

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

Worked as expected.

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.

Reliable product size and fit

As Advertised