Red side: 600 grit (fine)
Green side: 400 grit (medium)
Yellow side: 300 grit (coarse)
Grey side: 200 grit (extra coarse)
Red side: 600 grit (fine)
Green side: 400 grit (medium)
Yellow side: 300 grit (coarse)
Grey side: 200 grit (extra coarse)