It was easy to figure out what I needed and to order. Plus , I am more than happy to buy products made in the USA and see American communities and their citizens employed and contributing. Thanks!
I prefer the filters be in their own plastic wrapping. The plastic wrapping keeps the filters clear of dust and dirt. That's important when you are ordering the filters in bulk.
They are white, rectangular and pleated. Everything a guy could hope for in a furnace filter. Air goes in one side and out the other. After a while, one side of filter gets dirty. I take that as working properly. I have no scientific tools to give quantitative data, only my observational qualitative review.