Features:1.Suitable for mushrooms, agaric, and grains.2.A square sandwich bag can help increase the number of mushrooms.3.Using these bags to run spawning can shorten the fermentation cycle of the mycelium.4.The design of the ventilation opening saves a lot of labor, and you don't need to drill holes or increase oxygen. And bacteria can be isolated through nanotechnology.5.Polypropylene, resistant to high temperatures. Parameter:Name: PVC mushroom growth bagColor: TransparentMaterial: PVCSize:one hundred and eighty 350mm (approximately 7 13.7 ")three hundred and twenty 500mm (approximately 12.6 19.6 ")Thickne: 0.06 mmThe aperture of the ventilation window is 0.2umTolerable temperature: 0-130 C Package include:Mushroom spawning and growth bag * 50/100PCS Attention:1. Please allow an error of 1-5 millimeters due to manual measurement. Before you make a bid, please confirm that you do not mind.2. Due to different monitors, there may be differences in color. Please understand.