Grit to Mesh to Microns to Inches Conversion Chart
| Grit | Microns |
|---|---|
| 320 | 32.5- 36.0 |
| 360 | 25.8- 28.8 |
| 400 | 20.6- 23.6 |
| 500 | 16.7- 19.7 |
Regarding this, what is the unit for grit?
The grit sizes are defined by the number of lines per inch (25.4 mm) length of each sieve e.g. 150 lines per inch. Abrasives grit 150 will pass this sieve.