Upgrade your grain spawn process with our Premium Grain Jar Lids, designed for sterile, hassle-free inoculations. These high-performance, reusable lids are specifically crafted for wide-mouth mason jars—so you get the perfect fit for your setup.
 
Why Growers Choose These Lids
0.3-Micron Filter Patch – Provides optimal airflow while blocking contaminants.
Self-Healing Injection Port – Medical-grade silicone ensures easy, sterile inoculations.
Leak-Proof & Durable – Designed for repeated sterilization and long-term use.
Beginner & Expert Friendly – A reliable choice for small-scale and bulk growers alike.
 
Built for efficiency and longevity, these lids help ensure clean, consistent colonization—every time.
 
🛒 Order your 6-pack today!
 
(Glass jar not included.)