Upgrade your grain spawn process with our Premium Grain Jar Lids, built for sterile, hassle-free inoculations. These high-performance, reusable lids are precision-crafted for wide-mouth mason jars, giving you the perfect fit for dependable culture work.
 
Why Growers Choose These Lids
0.3-Micron Filter Patch — Provides proper gas exchange while blocking contaminants.
Self-Healing Injection Port — Medical-grade silicone allows easy, sterile inoculations.
Leak-Proof & Durable — Designed for repeated sterilization and long-term use.
Beginner & Expert Friendly — Reliable for small-scale or bulk cultivation setups.
 
Built for efficiency and longevity, these lids promote clean, consistent colonization in every batch.
 
Order your 6-pack of premium grain jar lids today and bring laboratory-grade reliability to your grow.
 
(Glass jar not included.)