I have the 9844K31 listed on the page below.
http://www.mcmaster.com/nav/enter.asp?pagenum=357
They state that these Polyester microfiber bags remove 99% of particles but don't state any industry standards....so?
I'll donate and mail the bag to anyone who wants to do a viscosity before and after measurement.
http://www.mcmaster.com/nav/enter.asp?pagenum=357
They state that these Polyester microfiber bags remove 99% of particles but don't state any industry standards....so?

I'll donate and mail the bag to anyone who wants to do a viscosity before and after measurement.