Gritomatic synthetic stones made of silicon carbide and aluminum oxide can be labeled in either FEPA-F or JIS grit scale. To make grit uniform and customer-friendly, we have started transition to the japanese (JIS) grit scale for all Gritomatic waterstones. Old naming: F120, F220, F400, F600, F1000. New naming: 120, 240, 600, 1000, 2500.

Leave A Comment