Confused on the Norax grit verses the number

[Nathan House]

I have the norton U264 and I am confused on what grit is to the number on the back of the belts.
here is my run down, what do I have?
Norax
X-100
X-65
X-30
Trizact-A-30
X-16
Someone please help me out
Thanks

 

[Mike Hull]

X100= no info
X65= P220
X30= P400
X16= P1200
A30= P700-800
Thats all I could find.

 

[Nathan House]

Thanks Mike that was a big help, I think the X100 maybe a 150 grit?

 

[RHINOKNIVES]

but i get a nice brush satin that i use on alot of my culinary and field knives.

 

[ragnoor]

In the 3M belts, the A-100 is 180-220 grit range.
ken (wwjd)