Why brave the “river” if you can go to the source?
"The amazon listing was unclear about the correct dimensions of the filter, so I decided to check out the manufacturer’s site. It took a minute but I was able to find the exact size of filter I needed. After I placed my order, I received an email double-checking whether I had the correct model, since I would have to pay for return postage. The shipment arrived much sooner than expected. With shipping, I might have spent a few dollars more than on the other site (where the filters cost more to begin with), But the peace of mind that I had ordered the right thing is more than worth it to me. I will definitely order direct again."
