100PCS Self Healing Injection Ports 13mm &120PCS Synthetic Filter Stickers

Worked great on holes drilled in mason jar lids. If hole is small enough, you can cut the patches in half. Rubber port was of high quality. Both survived pressure cooking well.

Used only a couple so far, looks good. Don't anticipate any negitive issues with remainder. Very reasonabley priced.

These work great! The ports are good for several uses and easy to replace. The filter patches hold up well in the pressure cooker and water beads off the material. I like the quantities for the price, a few hundred of each will last a very long time 👍

Filter stickers are functional. I wish this came with a small card or paper explaining the correct size hole for the injection ports. I can measure them with calipers but a simple piece of paper would have got that extra star.

So far so good. Used them for the first batch of liquid culture and put the jars through canning sterilization. They did not come detached and appears the adhesion is great.

Item fair priced and as described. Another comment says 5/16th bit, but that’s wrong. A 9/32nd bit is perfect to drill both holes and get a snug fit for the injection port.

Both port and filter are easy to work with. I used RTV with some of the ports and found no difference with not using any! Filter stayed dry with a foil cover on top.

Loved these things. Reusable, long lasting, and get the job done.