These are 14a filterpatch mushroom grow bags. They hold approxietly 5-6 pounds of hydrated substrate. 
 
Cases of 1000 or larger orders may sometimes be picked up at our location free of shipping charges. Please contact us before an order to see if this is possible. 
 
Lower 48 states only on 500+ bag orders please. 
 
Manufacturer's specs:
Type: Gussetted
Material: 2.2 Mil Polypropylene
Bag Size: 8″ X 5″ X 19″
Filter Type:A
Filter Size: 1.5″ X 1.5″
Filter Pore Size: 0.5 microns
Filter Hole: Style L