6Pcs Wide Mouth Liquid Culture Lid,Split-type Grain Spawn Cultivation Mason Jar Lid with 0.22um PTFE Syringe Filter & 20mm Self Healing Injection Ports For Mushroom Growing Mycology(Golden)…

Great lids. Still use them to this day purchased over a year ago. Withstands pressure cooker. Only have had to replace filters. Injection ports very sturdy.

Absolutely love these, they stand up to the heat I put them through in a pressure cooker and an instant-pot with no problem. They haven't deformed or lost their integrity, they create a good seal on the jars and the self healing ports work perfectly. The vent holes are great and there's 2 which is even better. Absolutely love these lids.

Use these with Masson jars, liquid culture and a pressure cooker. You got yourself a great way to turn that spore syringe into many

Nicer material than the cheap white ones at the store. They really shouldn't need gaskets and they make them more difficult to work with, but they did fine in the PC and my grain and LC jars did well with these. The syringe filter isn't enough air exchange for grain spawn, though. Since I was already using them, I pulled out one of the injection ports and covered the hole with a 0.2 filter sticker and it was good after.

With double vents this lid helps speed up colonization in grain spawn. If used on a LC jar it will grow to fast and not have long shelf life. Ran them twice so far in the PC with no issues.

These lids are great, handle the pressure cooker and hold up to multiple uses. Let the cooker cool completely before removing so the lids will contract back to their original size and avoid contamination. I ordered a 2nd set also. Buy these.

Only good for 1 maybe 2 uses. Plastic easily warps and does not provide good seal. INCREDIBLY hard to open once you can with them

Pushes all things about prepared lids to the max. Not even worth making your own. The strong plastic withstands intense heat from sterilization and make them dishwasher safe. They can be completely disassembled for easy cleaning and come with two injection ports for more than enough use before replacement. The seal is much stronger than regular jar lids as well making for less contamination. They are slightly more expensive but worth it in every regard!