Name: PVC Mushroom Grow Bag Substrate High temp Sealable Model: A03852 Size: 250500mm (. 1020 inch) Thickness: 0.06mm window size: 5555mm window : 0.2um Suitable for mushrooms, , grains. Square gusset bags can help increase the amount of mushrooms. Using these bags for running spawn, and the mycelial fermentation can be shortened. window design saves a lot of labor, you do not require drilling and oxygenation. And it can isolate via nanotechnology. Polypropylene, high temperature resistance. Color: Transparent Material: Polypropylene Package Contents: 50 * Mushroom Grow Bag Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.