This is a new and genuine Rolex Oyster bracelet half link, made from brushed stainless steel with polished sides. It measures 16.5mm wide and comes with the original Rolex screw for installation.
There are photos of your link and screw from multiple angles.
If you are not sure if this will fit your watch or if you have any other questions, feel free to email me at Sales@TheWatchLink.co.uk. I'm happy to help!