6 Sizes 50/100PCS PVC Mushroom Spawn Grow Bags Specifications: Material: Polypropylene Color: Transparent Thickness: Approx. 0.06mm Dimensions(approx.):18*35cm/7*14inch,18*50cm/7*20inch,25*50cm/10*20inch,32*45cm/13*18inch,32*50cm/13*20inch,32*65cm/13*26inch Quantity:50/100pcs Package Included: 50/100Pcs x Mushroom Grow Bag Features: -Can be used for running spawn, and the mycelial fermentation cycle can be shortened. -Help to increase the amount of mushrooms. -Suitable for mushrooms, fungus, grains. -Air vent window design saves a lot of labor, you do not require drilling and oxygenation. And it can isolate bacteria via nanotechnology. -Polypropylene, high temperature resistance. Note: Please allow minor deviation due to manual measurement. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.