Mushroom Tech Bag - Grain spawn (0.2 micron)

These are high quality polypropylene gusseted, extra thick mushroom bags.  3 mil thickness, thicker than other bags such as the Unicorn bag.  Non-woven filter for great gas exchange for quick bulk colonization process. 

Great for 5lb substrate blocks, a preferred weight by farmers for easy moving and logistics. 

Pasteurize or Sterilize.  Close with Impulse Sealer or Zip Ties. 

0.2 micron nonwoven filter

Dimensions: 8″ X 5″ X 20″

Thickness: 3.0 mil