Product review (1 stars): Don't waste your money
I ordered this, received it, and installed it according to directions.  Four days later, the refrigerator is telling me that it needs changing.  I've talked to GE and apparently this is one of the cartridges that is defective.  Since the packaging is long gone, I am now out the purchase price plus having to order new ones.

Buy direct from GE - at least you have some recourse.