Product review (1 stars): Does not match GE MSWF filter specs.
Please do not be fooled by the MSWF designation.  The opening diameter is much too large and the seal incomplete so that trying to use this filter will result in air bleed and hammering of the water system.  I have returned it and replaced it with a GE filter -- which unfortunately has the opposite issue of trickle output, but that is another story.  On the other hand the return and refund for this Tier1 were painless.  However I cannot recommend this as a product replacement for GE MSWF refrigerator water filter.