What mesh for inline filter?

[planker101]

Looking for suggestions for what mesh size to use for an inline filter. I dislike the amount of particulate in my kettle at the end of the boil and would like to get it out during brewing. I have a sight glass I'm not using as well as all other needed parts except the screen. I'm going to use a tri clover screened gasket at the outlet of the sight glass. Plan is to have it close to the kettle so I can close the ball valve on the kettle outlet and clean the filter as needed.
Shooting from the hip I'm thinking 100 mesh, but I have very little experience with mesh sizing and what it will or won't let through. I'm looking for a combination of flow and filtering.
Thanks for any suggestions.

 

[shaky6]

300 micron, whatever that transfers to in mesh standards

 

[planker101]

Glad you mentioned microns, I was thinking about this all wrong. 100 mesh would have been way finer than I want. Thanks!