Description:
The groove depth value Marked on the flat steel to read the particles' size.
The particle distribution's unit is um or Hegman, from 0-8 Hegman.
0 Hegman=100 um, 4 Hegman=50 um, 8 Hegman= 0 um.Using: Put some particles on the deeper groove, then use scraper to scrape them from deeper to low groove.