Microppose Self Healing Injection Ports for Mushroom Spawn Bags and Jar Lids (50-Pack)

I'm very happy with these. So far they have survived 3 sterilization cycles with no sign of giving up. I was using the rubber plug style ports, but I was tired of having to dig colonized grain out of the bottoms when I spawned to bulk. No more stuck grain.

Used these on Mason jars for mushroom grain spawn. These stayed on well after putting them through the pressure sterilizer. I am having successful mycelium growth with no contamination in all 12 jars that I made so they seem to work well.

These work perfectly for making liquid culture jars.

Stick like crazy. Been thru the dishwasher a few times and still holding.

Work very well. Does as expected.

These are indeed the best self injection ports. I’ve used others and they tend to need specific sized holes for a perfect seal to keep contamination away from your project. These you only need to make a hole big enough for your needle and then stick one of these puppies on. The healing factor is amazing. Less than a second and could barely tell I ever punctured the port. Not to mention they can handle multiple runs through a pressure cooker. Still have yet one to feel as if it lost its bond to my mason jar lid.

Great for inoculation ports on jars. Works as extra port on grain bags

Work well and adhesive cleanly survives the autoclave.