Roland, I now have the filters in front of me and they are as I have described above. The one that says "made in Canada" looks like it is a better filter then the one that says "made in USA". The holes around the perimeter are much larger and there are 8 of them instead of the 6 smaller holes on the "made in USA' filter. Looking inside the filter the "made in Canada" filter again has larger holes and it appears to also have more holes. Both filters were bought at the same place but at different times. Bothe part # FL-820S.
