The levelness tolerance indicates the max deviation between the highest and lowest point on the surface (temperature + 20°C)

Measuring surface length
[mm]		Levelness tolerance (flatness) in ?m for different degrees of precision:
000123
100 2 4 11 22 44
160 2 5 12 23 46
250 3 5 13 25 50
400 3 6 14 28 56
630 3 7 16 33 65
1000 4 8 20 40 80
1600 5 10 26 52 104
2000 6 12 30 60 120
2500 7 14 35 70 -