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Restek Packed GC Columns — Mesh Size–Micron Conversion

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Mesh Size Conversions

Mesh Microns
20 850
25 710
30 600
35 500
40 425
45 355
50 300
60 250
70 212
80 180
100 150
120 125
140 106
170 90
200 75
230 63
270 53

Example: 80/100 mesh = particle sizes between 180 and 150 microns.