Bag Size: 250X500x0.06 mm Filter Size: 55X55mm Filter Pore Size: 0.2 Microns Material: 3.0 Mil Polypropylene Autoclavable: Yes Feature - Suitable for mushrooms, fungus, grains. - Air vent window design saves a lot of labor, you do not require drilling and oxygenation. - Polypropylene, high temperature resistance.