As described. It looks to be around 30-50 grit, although that isn't mentioned anywhere. Decent roughing wheel. 23 days shipping.
Looks similar to the picture in the post but the amount of diamonds is smaller. I have not used yet. In the test I saw that: the segments are 3.2 mm high, the disc diameter is 35 mm, and it is centered so that it seems to do the job. The delivery arrived within 20 days.