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Grit - Micron Conversion

American  Standard (Grit)

Micron

100,000 1/4
60,000 1/2

14,000

1 
13,000 1.5
9,000 2.5 
8,000 3
5,000 4
4,500 5
2,800 7
1,800 9
1,400 14
1,200 15
1,050 18 
800 25
600 30
500 35
325 45
285 55
240 70
225 90
160 110
100 150

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