The DuPont filter was exactly as described. OEM from DuPont in new, sealed bag. Worked as it should upon installation as a replacement filter for an old, depleted one.
It doesn't seem to be filtering the water as well as it should. When the filter is being used the stream of water should diminish significantly because the water is being filtered. That hasn't really happened with this new filter making me wonder if it hasn't been previously used.