Code | Attachment level (mm)* | |||
I | II | III** | IV** | |
U-CI U-LI U-C U-PM1 U-PM2 U-M1 U-M2
L-CI L-LI L-C L-PM1 L-PM2 L-M1 L-M2 | 0 0 0 0 0 0 0
0 0 0 0 0 0 0 | 2 2 2 2 2 2 2
2 2 2 2 2 2 2 | 4 4 5 4 4 4 4
4 4 4 4 4 4 4 | 6 6 8 6 6 6 6
6 6 7 7 7 6 6 |