100 Pack of 15 x 50cm Grow Bags that allow plenty of room for mushroom growing and spawn, substrate and fruiting. These side-gusseted breathable bags stand up and hold strong.TEAR RESISTANT: Extra Thick 6 Mil Bags, these are designed to withstand high temperatures that come with sterilization.High temperature resistance 121-125CelsiusEXCELLENT FILTERING 2 Micrometre filter patch allows for gas to freely be exchanged, while keeping contaminates out. The clear bag helps to quickly spot any instances of contaminationGROW LIKE mushroom growers around the globe use these bags to dramatically reduce space needed to grow or spawn mushrooms when compared to trays, tubsMULTI USE for inoculation of media with mushroom oyster spawn, clone oyster mushrooms and more vent window size: 55x55mmSize: 15cm x 50cmThickness: Extra Thick 6 Mil BagsSealing :Our these mushroom bags can be sealed with an impulse sealer, or just tie to seal . these bags are durable and can be reusable in most times.Water content of culture material: If the water content of the medium is too high, the ventilation will be affected, hyphae will grow slowly due to lack of oxygen, moisture will be deposited in the lower half of the cultivation bag, and the hypha length will not be able to go.colour:TransparentMaterial:PPPackage Contents:100 x Mushroom Grow BagOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.