Shimano SM-BB70 XT / SLX HollowTech II bottom bracket set.
Comes with two 2.5mm spacers so will fit bottom bracket shells widths of 68 or 73 mm.
The bottom bracket has never been used, but is not in its original box. It came with a new Shimano crankset I purchased several years ago but I already had a Hope bottom bracket fitted to my bike, so didn't need it. The grease you can see, on the threads, in the picture is the fresh, original grease applied in the factory.