AV installers and home theater geeks, this little adapter is super handy. It's an HDMI keystone jack insert – basically a female-to-female HDMI coupler that fits into a standard keystone wall plate. Length is 8 inches, so it gives you a bit of extra reach behind a wall or cabinet. Connectors are HDMI 1.4 standard on both ends, supporting HD video and audio signals. Color is black to blend with most setups. Brand is My Cable Mart, MPN is FE-KEY-HH-8IN-BK, UPC is 712396265856. New and unused in packaging. Why would you need this? Well, if you're running HDMI cables through walls and want a clean, modular look, you install a keystone wall plate, then snap this insert into it. It allows you to connect two HDMI cables together behind the plate, making it easy to change or upgrade cables later without fishing new wires. Also useful as a short extension or coupler if you need to join two cables without a bulky adapter. Great for home theaters, conference rooms, gaming setups, or any professional AV installation. The build feels solid, and the 1.4 spec covers most common needs (though not 4K at high refresh rates – keep that in mind). Makes your setup look pro and keeps things organized. A must-have for cable management nerds!