We offer discount for large quantity. Welcome to us!100pcs Mushroom Grow Bags Spawn Bags Thick Bags 6 Mil 5.9 Inch x 13.8 Inch 0.2 Micrometer Breathable Filter Autoclavable100 Packs 15X35cm Planting Bags provide enough space for mushrooms to grow and lay eggs and substrate and fruits. These breathable bags with side flaps can stand and stay strong. Tear Resistance: Extra thick 6mil bag, designed to withstand the high temperature caused by sterilization. 121-125° High Temperature Resistance Excellent Filtration Function 2 micrometer filter membrane can exchange gas freely, avoiding pollution. Transparent Bag Helps You Quickly Find Examples of ContaminationCompared to professional mushroom growers, compared to trays and pots, the use of these bags can significantly reduce the space required for mushroom cultivation or spawningCan be used for medium inoculation of mushroom oyster spawning, cloning oyster mushrooms, etc. Thickness: 6 Mil extra thick bagSealing method: our these mushroom bags can be sealed by impulse sealer or just bond with sealing. These bags are and can be reusable in most cases. The water content of the breeding material: if the water content of the medium is too high, the ventilation will be affected, the hyphae will grow slowly due to the lack of oxygen, the moisture will be deposited in the lower half of the grow bag, and the length of the hyphae will not be able to pass. Size: 15x35cm Material: PPColor: Transparent Package Content: 100 x Mushroom Magnifying BagOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm. About UsWe provide good product with best price, we support wholesale order/