This is a brand new genuine BMW M Performance 345 x 24 mm right rear brake rotor for the BMW G20 3 Series 2019+. Specifically, on the M340i/M340i xDrive this is a direct replacement. If adding to a different G20/G21 3 Series then you will likely want the M Sport or M Performance calipers as well. This is the actual rotor that you get in the M Performance full brake upgrade retrofit kit that we also sell in its entirety in our eBay store.
I also encourage you to check out my eBay Store which may have additional new European upgrades you'll be interested. In addition to that, if you're looking for any BMW part or accessory whatsoever please email me and I'll be happy to track it down for you and post it on eBay.
Check out our extensive selection of great BMW parts and accessories by going to our store:
http://stores.ebay.com/Euroactive
Thanks for looking!