100PCS Self Healing Injection Ports and 120PCS Synthetic Filter Stickers Mushroom Growing Supplies（13.2mm for Ports &20mm for Stickers ）

good product at a good price.

These items are working very well and im pleased.

Very good purchase this pairs good with plastic lids. Metal was sharp and harder to work with and rusted. Put multiple needles through it no leaks.

I used this to make jar lids for mycology.I can have 10-20 jar lids ready to go in 15 minutes with this.Only slight downside is the injection ports don't last long before they stop resealing.You can fill the open section in the bottom of the port with a bit of high temp silicone to extend lifespan.

These work well. The only note I would make is that while the seller suggests a 0.2" hole, I've found that a 1/4 drill bit works best for the injection ports. Fits snugly and I've already inoculated several jars without issue. I have a bench drill which made the process a cakewalk, but a hand drill will work fine.

Exactly what I ordered

A few months in these work perfectly! Used a regular sized hole punch for the lid. Does require a little work to get the piece in but it needs to be tight! Will buy again when needed.

Both the rubber ports and the vent stickers work very well and are just the right size. I used these on the lids of ball jars to make liquid culture.