Versatile Protection: These vent covers are designed to keep dog hair and debris out of the ducts and fans, ensuring optimal air flow. They help maintain a healthy environment for plant growth and effectively meet a variety of . Installation is simple: place it over the vent duct opening, tighten the drawstring and secure. Please check the size before purchasing to a . Superior Construction: These duct filter covers are made of waterproof Oxford cloth with a double-layer design to withstand wet conditions without damage. The central net is made of odorless thread fabric to durability and safety in the grow tent environment. Adjustable and Secure: These vent covers are designed with double drawstrings, which can easily adjust the opening size to meet specific needs, ensuring a secure fit to prevent falling off. They are , reusable, and designed for long-term use. Convenient Maintenance: These vent covers are washable and easy to clean, which is conducive to and . The package contains four 6-inch duct filter covers for easy rotation of cleaning and replacement. Colour:black Material:Oxford cloth Package Contents: 4 * Tent ventilation cover 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.