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 121-125Celsius EXCELLENT 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 contamination GROW LIKE A PRO mushroom growers around the globe use these bags to dramatically reduce space needed to grow or spawn mushrooms when compared to trays, tubs MULTI USE for inoculation of media with mushroom oyster spawn, clone oyster mushrooms and more Air vent window size: 55x55mm Size: 15cm x 50cm Thickness: Extra Thick 6 Mil Bags Sealing method: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: parent Material:PP Note: Unfolded size: 15x50cm Both sides folded size: 8x50cm Package Contents: 100 x Mushroom Grow Bag Only the above package content, other products are not included. Note: Light reflection 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.