Product review (5 stars): FIT PERFECT
I am so happy with this filter.  It fit just right and you can taste that it is working.  At $11 per unit I am only paying $22 per year for filtered water.  Very affordable.  Plan to buy one more set so I am good for 3 years.  I had to buy the expensive ones before as the affordable ones were out of stock for a long time.
REMEMBER TO THROW AWAY THE FIRST GALLON OF WATER.  IT REMOVES ODD TASTES AND ANY CARBON PIECES.  THIS IS NOT A DEFECT.