About This PRECISE DIMENSIONS – Insertable neck dimensions 12.00" x 5.31". Flange dimensions: 12.79" x 6.10". Opening dimensions: 12.00" x 4.13". DURABLE ALUMINUM BUILD – The vent cover is made of high-quality aluminum sheet without any welds offering a modern appearance and long-lasting performance. The grille can be used without any anti-corrosion protection and its RAL 9016 powder-coated finish adds durability. ADJUSTABLE LOUVER BLADES – Integrated louvers allow manual airflow control directing warm or cool air as needed. Improves comfort and efficiency in HVAC heating cooling and ventilation systems. EASY INSTALLATION – Supplied with built-in mounting clips for quick and secure setup. Soft edges ensure a safe handling experience and help achieve a tight stable fit without extra tools or fasteners. WIDE APPLICATION – Works as a supply vent return air grille or exhaust grille. Ideal for home improvement bathroom living room office basement or renovation projects. Compatible with most HVAC duct systems.