Hey HVAC folks and DIY home improvement enthusiasts! This PATIKIL duct connector flange is exactly what you need for your ventilation projects. Made from durable galvanized steel that's corrosion-resistant and built to last, this flange measures 10.2 x 10 inches at the interface with a 12.2 inch base diameter. The 2mm thickness means it's sturdy enough to handle regular use without warping or bending. What's really convenient are the pre-drilled screw mounting holes - no need to drill your own, just line it up and secure it directly to your wall with screws. You've got two installation options: use it directly with a duct connector, or weld it right onto metal air ducts or fan outlets/inlets. It's super versatile too - works great for home ventilation systems, kitchen and bathroom exhausts, garage setups, and even industrial applications. The silver tone finish looks clean and professional once installed. Just make sure to check your connection diameters before ordering to ensure everything lines up properly. If you're tired of makeshift duct connections that leak air or don't seal properly, this professional-grade flange provides that solid, secure connection you need for an efficient ventilation system. It's one of those simple components that makes a huge difference in how well your HVAC or exhaust system performs, and the quality construction means you won't be replacing it anytime soon.