12 Wide Mouth Lids for Mushroom Culture *Grain Spawn Master's Lids 90mm Reusable Autoclavable Plastic Lid Made by Ball 20mm Butyl Self Healing Rubber nubbed Injection Port 1/2" Hole for Gas Exchange With High Quality Synthetic Filter Disc
12 for $40.00 with free shipping.
**Jar not Included. **
The injection port design is airtight and has been vacuum tested. " these synthetic filter discs are able to be used within a pressure cooker, steam sterilizer or autoclave. They are reusable, highly durable and have a filtration rate of 99.97% and will filter down to .3 microns"
Designed for Grain Culture.
Fast shipping great product! Would recommend
Feb 11, 2018 by Jeremy
Quick delivery, great quality. About to inoculate some straw this weekend with spawn made using these lids.
Feb 1, 2018 by rmciver4
Dec 23, 2017 by Kyle Hawk
Fast fast shipping thank you ! I can’t wait to start growing my mushrooms