Mushroom Spawn Bags. 100x Unicorn 4T Bags with Injection Port.

  

Material: 3.0 mil polypropylene. Bag size: 4 x 3 x 18. Filter size: 1.5x1.5. Filter pore size: 0.2 microns.

These genuine unicorn bags contain an inbuilt injection port (they are not standard 4t bags with an added microppose port). They are often used in the production of grain spawn and hold up to a kilogram of spawn. This side-gusseted breathable bag gives a sturdy stand-up bag after filling and a strong bottom seal.

Unicorn bags are pliable at any temperature as well as after sterilization. The bag opening is designed for easy sealing and the bag's bottom seal can withstand agitation.