400 packs of 15 X 35 cm planting bags provide enough space for mushrooms to grow and lay eggs, and the substrate and fruit. These breathable bags with side flaps can stand and stay strong. Tear resistance: 6 bag, designed to withstand the high temperature brought by . High temperature resistance 121-125℃ Excellent filtration function 2 Micrometre filter membrane can freely exchange gas while avoiding pollution. Transparent bag helps to quickly find any examples of contamination Compared with professional mushroom growers, compared with trays and pots, the use of these bags can greatly reduce the space required for mushroom cultivation or spawning Can be used for medium inoculation of mushroom oyster spawning, cloning oyster mushroom, etc. Thickness: 6 Bags Sealing method:Our these mushroom bags can be sealed with an impulse sealer, or just tie to seal . these bags are and can be reusable in most times. Water content of culture material: If the water content of the medium is too high, the ventilation be affected, hyphae grow slowly due to lack of oxygen, moisture be deposited in the lower half of the cultivation bag, and the hypha length not be to go. size: Expanded size 15 x 35cm The original folded size is: 8 x 35cm Material:PP colour:Transparent Package Contents: 400 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.