2 Pack channel filter mesh covers in diameter options of 4 inch, 6 inch or 8 inch. Select the size you need. The two-pack design makes cleaning and replacement easy. Elastic band and fixed buckle provide an adjustable, secure fit on ventilation openings. They stay in place, prevent covers from slipping off, and help keep your plant tent clean and dust-free. Mesh holes are sized to provide ventilation while effectively blocking dust and spiders. They protect your plants and support healthy growth. Made of waterproof Oxford cloth, these covers withstand damp environments without damage. The middle mesh is odourless, and the nylon rope elastic band adds long service life. Applicable scenarios - Cover ventilation ducts on a grow tent to balance airflow with dust and debris protection. - Use on ducting in indoor gardens or hydroponic setups to prevent dust and pests while maintaining airflow. - Deploy in humid or damp grow environments where waterproof protection and durable construction are valued.