These Unicorn Type 14-A Grey bags feature a tinted grey design that helps reduce light penetration and minimize side pinning while maintaining visibility of substrate development. Made from durable 2.2 mil polypropylene, they include a high-quality 1.5” x 1.5” 0.5 micron filter for excellent gas exchange and contamination protection.

They are perfect for standard grow blocks when testing new varieties or starting production and are sized to hold 5–7 lbs of substrate.

These are genuine Unicorn Bags, made in the USA to the high standards the brand is known for. The polypropylene construction makes them fully autoclavable.

Save time by pairing these bags with MushroomMediaOnline’s Fast Fruiting Mix, a balanced 50/50 hardwood sawdust substrate supplemented with 50% soy hulls.

Free shipping is included with your purchase of a bag from MushroomMediaOnline.com. We secure the best shipping rates, so the larger your order, the more you save.

Brand: Unicorn
Model: Type 14-A Grey
Material: 2.2 Mil Polypropylene
Bag Size: 8″ × 5″ × 19″
Filter: 1.5” × 1.5” (0.5 micron)
Typical Block Size: 5–7 lbs