Package Includes: the package comes with 4 pcs of ceiling diffusers and 12 screws, offering sufficient quantity to meet your installation needs; Whether you're renovating your home or working on a large commercial project Durable and Reliable Material: made of sturdy steel, the round ceiling diffuser is designed for longevity; They are not easy to break or fade away, serving you a long time, enhancing their lifetime Easy Installation: for your convenience, we include screws to ensure you have most things you need for an easy installation or replacement; Simplifying the installation process of the air duct vent cover and eliminating the need for additional hardware purchases Ideal Fit: with an approximate size of 9-15/16" in diameter, our air conditioner vent cover is suitable for 6 inch ducts. They seamlessly blend into your HVAC system, promoting efficient ventilation without inconvenience Wide Range of Applications: our 6 inch vent cover is not only durable but also versatile; These products suit a wide range of applications, making them suitable for ventilation in various spaces, both indoor and outdoor, like home HVAC systems, kitchen exhausts, and more