Product review (2 stars): Counterfeit red flags?
As others have stated, this has all sorts of red flags for counterfeit.
Red flag #1; Low price. Of course, this is what makes it a great deal, but if we're honest, it's a red flag that it's much cheaper than the competition.
Red flag #2; The box I received had clearly been opened.
Red flag #3; The plastic body of this filter is a completely different shade of white than the original filter that came with my refrigerator.
Red flag #4; The knob on the end of the filter does not sit straight up and down when the filter is properly twisted into place.
Red flag #5; This filter sent lots of activated carbon through the water dispenser when I first flushed out the air bubbles. This didn't happen with my original filter.

It still appears to function perfectly fine but all of these red flags certainly point to this being a knockoff product.