| Grade |
Shore A |
Hardness |
Color |
| PU 1 |
45-50 |
Extra soft |
Transparent, light yellow, yellow, red |
| PU 2 |
50-55 |
Extra soft |
| PU 3 |
55-60 |
Extra soft |
| PU 4 |
60-65 |
Soft |
| PU 5 |
65-70 |
Medium Soft |
Light green, Green |
| PU 6 |
70-75 |
Medium |
| PU 7 |
75-80 |
Hard |
Blue, Brown, Coffee, Pink |
| PU 8 |
80-85 |
Extra hard |
| PU 9 |
85-90 |
Extra hard |
| PU 10 |
90-95 |
Extra hard |
|