Product review (4 stars): Effective replacement for factory filter
Perfect sized replacement for the "stock" filter at half the price. My fridge is a GE part GSS22JFMAWW.  As to what it exactly is filtering out I'd have to guess. But water tastes fine and is clear even when we have sediment in our lines due to our being a the end of a cul-de-sac and a piping run.