This is a 2-meter long lighting rail. It's a modular type, so you can change the length to 50cm, 1m, or 1.5m, making it usable even if you move to a new home. *Please note that it can only be installed on ceiling plugs with ears.* I bought this intending to use it in my home, but it turned out my ceiling plug didn't have ears, so I'm selling it. It's unused, I only assembled it once. *There are small scratches on the parts where the screws overlap during assembly.* *I couldn't remove the copper pins at the connection points, so I will send it as is.* If you're looking for a long duct rail, please consider this. I am a woman, but I was able to assemble it myself while watching the official Beamtec video.