A genuine Renault part that's an identical drop-in (or rather screw-in) replacement for the original corroded item. You also get three M6 nyloc screws in the pack, to fit on the three mounting studs (if you need 'em).
Photos often show the battery terminal clamp nut (another M6 nyloc) located beneath the stud rail, where it's difficult to access. (At least, it is on my Laguna Coupe). However, it's easy to turn the clamp nut and bolt around so the nut is at the front where access is easier with a 10mm spanner or socket.