1.Worry-Free Living: The vent cover frame is crafted from robust magnetic and sturdy PVC materials, making it suitable for use with metal register, air vent, and ac vent of 4x10in size. With our magnetic vent cover, you no longer need to worry about small items falling into the air vents. 2.Effortless Installation: Gone are the days of fumbling with complex tools and instructions. In actuality, simply place the magnetic vent cover on the metal vent and it will magnetically attach, completing the installation process. Itand#39;s so easy, anyone can do it! 3.Superior Ventilation: Uncompromising on airflow, our ac vent cover features a fiberglass mesh that boasts unparalleled ventilation performance. With a mere 1% blockage rate, it ensures optimal air circulation while trapping any unwanted debris. 4.Long-Term Savings: Not only does our magnetic vent cover enhance your homeand#39;s comfort levels, but it also contributes to long-term savings on utility bills. By optimizing airflow and preventing blockages, it helps your HVAC system run more efficiently. 5.Pest-Free Living: Say goodbye to unwelcome guests like bugs, spiders, and other creepy-crawlies. Our vent cover acts as a barrier, preventing these pests from entering your home through the air ducts, especially in bedrooms where you need peace and quiet the most. Material: PVC+rubber colour: black Package Contents: 1 set x magnetic vent covers(6 pcs) 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.