FITS UP TO 3" X 3" OPENINGS – OPENING SIZE: 2.91" x 2.91". OUTER DIMENSIONS: 3.94" x 3.94". SCREW HOLES 3.26" x 3.26". THICKNESS 0.23". Precise fit for EXACT OR SMALLER THAN 2.91" x 2.91" ceiling vent openings and wall duct openings. DURABLE PLASTIC MOISTURE-RESISTANT BUILD: Crafted from quality plastic, built to withstand everyday use. Ideal for indoor and outdoor spaces — rain, sun, or airflow won’t wear it down easily. FUNCTIONALITY & PROTECTION – Integrated nylon screen mesh prevents unwanted things entering the airflow system. Provides smooth ventilation in HVAC air return, camper vent pipe, and fresh air intake applications. INSTALLATION & USE – Flangeless design allows flush surface mounting on ceilings, walls, or soffits. Pre-drilled holes with plugs conceal screws for a seamless look. Can be installed in bathroom exhaust, garage, bedroom, or office ventilation. SCREWS NOT INCLUDED. APPLICATION & BENEFITS – Ensures proper airflow, reduces condensation, and prevents moisture buildup in home or RV ventilation systems. Perfect for dryer cleaner vents, pipe outlets, and indoor or outdoor air circulation. Ozo Brothers works with manufacturers, markets and distributes products and system solutions for simplified construction and improved indoor climate. // The products are characterised by their high quality, ease of assembly and consideration towards the environment. // We simplify construction // At HVAC OV, we simplify construction because it is in human nature to build. By simplifying in every stage, we make it easier to install seamlessly. We develop products with people in mind. We offer solutions that meet the demands for comfort, simplicity and aesthetics. // We are driven by a strong passion and desire to continuously offer improvements. // Partly for all the customers and partners who use our products and solutions, but also for the people who live and work in buildings that uses our products. We simplify construction and help to create a healthy indoor climate. // Ideal for all tumble dryer vent pipes / hoses, bathroom extractors & vents, air conditioning and heating units, kitchen vents & fans, all home wall and ceiling vents, heat transfer and ventilation systems, gas & electric dryers, cooker hood extractors, as well as a wide variety of industrial uses.