Product review (2 stars): Doesn't fit Frigidaire model FPHB2899LF3  Look for second "alignment guide"
Even though my frig manual lists both this part and the ULTRAWF, this device would not fit my refrigerator. I have now ordered the ULTRAWF to try.

On this filter model, it appears the manufacturer has added a second guidance groove (they call it a alignment guide) to the case. As you look down the end of the filter, it is located at about the 10-11 o'clock position,in ADDITION to the groove at the top. If you look at your filter in your frig, if it does not have this second groove, this filter will not fit.

On the package there are images of the filter replacement process. Even these images do NOT show this second groove/alignment guide. Just beware....