Pool Filter 4-Pack ,Replaces Unicel C-4325, Pleatco PA225-4, Filbur FC-1220 Filter Cartridge for Swimming Pool and Spa

Just what I needed fit perfectly

The filters collapse when they get dirty and let the water bypass.

I have used these filters for two years on my above ground pool. They work good but do not remove all the iron from our water as we are on a well but it works as well as to be expected.