It is true that (1) the hole can accommodate an M6 screw and (2) the material appears to be titanium. However the description does not say the ID or OD. The washer is too large for my application. The ID is 6.7 mm and the OD is 11.6 mm. Thickness is 1.5 mm. The finish on some washers is quite rough, but this is OK for such a low price!
The quality of items was so bad. They could not be used.