Product review (5 stars): Tight fit, but works great
Ordered these to replace the one in my GE Profile refrigerator (MWF).  Filter works great !!  Install requires a reasonably hard press upward (support the top of the fitting while doing this) probably due to the 4 o-ring seals, but once pushed up just turn and it's installed.  Be sure to flush out the system as some carbon deposits will come through for about the first 6 - 8 cups of water.