This Mushroom Cultivation Bottle Cap Breathable Film is a must-have for mushroom cultivation enthusiasts. Its dual design of breathable film and isolation film ensures the perfect conditions for mushroom growth. With enough pieces in a pack, it provides ample supply for large-scale cultivation projects. The EPTFE materials used in its construction its durability and easy maintenance. The film attach tightly on the bottle cap can prevent most contamination, ensuring the purity of your mushroom cultures. Features -Color:Sky-blue -Material:EPTFE -Size:34.00X9.50X0.10cm/13.36X3.73X0.04in -Note:48Pcs/Sheet -Essential for enthusiasts of mushroom cultivation. Ensures optimal growth conditions with its dual design -Suitable for large-scale cultivation projects due to its ample supply. -Made with breathable and safe EPTFE materials, ensuring durability and easy maintenance. -he film attach tightly on the bottle cap can prevent most contamination, ensuring the purity of your mushroom cultures. -Maintains the purity of mushroom cultures with a tightly sealed bottle cap and breathable membrane. Package list: 2 x Sheets of Bottle Cap Inside Pads