Alec:
You want 6-8 mesh Sofnolime. ( that is not that 6 or 7 or 8 mesh
will do . . '6-8' is a designation that the batch contains granules that
range between . .you guessed it ! 6-8 mesh.) You order as "6-8". BTW, This
general scrubber thread is fascinating and not a little disconcerting . .
Phil Nuytten