Comparison chart of micropower grit sizes
| Serial Number | Maximum diameter | 3% | 50% | 94% |
|---|---|---|---|---|
| # 240 | Below 127 | Below 96 | 57.0 ± 3.0 | More than 40.0 |
| # 280 | Below 112 | Below 80 | 48.0 ± 3.0 | More than 33.0 |
| # 320 | Below 98 | Below 68 | 40.0 ± 2.5 | More than 27.0 |
| # 360 | Below 86 | Below 60 | 35.0 ± 2.0 | More than 23.0 |
| # 400 | Below 75 | Below 52 | 30.0 ± 2.0 | More than 20.0 |
| # 500 | Below 63 | Below 43 | 25.0 ± 2.0 | More than 16.0 |
| # 600 | Below 53 | Below 36 | 20.0 ± 1.5 | More than 13.0 |
| # 700 | Below 45 | Below 32 | 17.0 ± 1.3 | More than 11.0 |
| #800 | Below 38 | Below 27 | 14.0 ± 1.0 | More than 9.0 |
| # 1000 | Below 32 | Below 22 | 11.5 ± 1.0 | More than 7.0 |
| # 1200 | Below 27 | Below 20 | 9.5 ± 0.8 | More than 5.5 |
| # 1500 | Below 23 | Below 17 | 8.0 ± 0.6 | More than 4.5 |
| # 2000 | Below 19 | Below 11 | 6.7 ± 0.6 | More than 4.0 |
| # 2500 | Below 16 | Below 14 | 5.5 ± 0.5 | More than 3.0 |
| # 3000 | Below 13 | Below 9 | 4.0 ± 0.5 | More than 2.0 |
| # 4000 | Below 11 | Below 6 | 3.0 ± 0.4 | More than 1.3 |
| # 6000 | Below 8 | Below 4 | 2.0 ± 0.4 | More than 0.8 |
| # 8000 | Below 6 | Below 2 | 1.2 ± 0.3 | More than 0.6 |