What are the sizes of sanding sleeves:
80 grits, 120 grits, 180 grits, 240 grits, 320 grits, 400 grits
How to choose different particle sizes of sandpaper?
40-grit to 120-grit sandpaper is coarser and is used for sanding harder items such as walls, metal, wood blocks, etc.
150-grit to 320-grit sandpaper is suitable for the second sanding.
400-grit to 2000-grit sandpaper is very fine and suitable for final sanding and polishing. It will not damage the surface of the item.