Product review (5 stars): Very good value
They work fine on my Frigidaire. I do recommend soaking them for 30 minutes prior to use. I neglected to do this on the last one I installed and the water output was gray with charcoal for the first few gallons of water but then the water cleared up. Previously, I had pre soaked them, and not found this problem. I have been using these for several years and am quite happy with them. From Amazon, they cost considerably less than if obtained locally. I fully recommend them.