12 ct Mushroom Spawn Jar Lids Injection Ports & .2 Micron Gas Exchange Filters (Regular Mouth)

["Shroomability’s modified mason jar lids are designed with growers in mind—unlike one-piece plastic or metal lids that were only made for storage. Our lids deliver the secure silicone seal you can trust, preventing unwanted air from sneaking in through the threads and giving you the confidence of reliable, high-quality results every time. We know this from experience.","Most sellers of these type of lids drill the holes which heats the metal up and changes the metals properties and they rust during the first use. We don't drill our lids. We sit down at our industrial punch machine that cold punches the lids and creates no heat in the process. You can get multiple uses from these lids making them very cost efficient. Hand wash for best results.","We start with high quality lids and manufacture them one lid at a time by hand. Lids will arrive perfectly to your door in crush proof packaging.","Shroomability Spawn Jar and Liquid Culture Mason Jar Lids have a silicone ring embedded in the lid to keep contaminants out. Never boil lids as silicone will be damaged."]