Product review (4 stars): Smaller than all the others I've had, but it works
My Kenmore refrigerator uses a 9915 filter (quarter-turn in the base grille).  This filter is significantly skinnier and about 1/2" shorter than all the filters I've had before.  When I first saw it and started to install it, I thought it was completely the wrong size and not a proper replacement.  But when I made a 2nd attempt to install it, I found I was able to screw it in (1/4 turn) and use it without problem.  I've been using it several days now, and there have been no leaks or issues.  I only need filtering of particulates (there are no chemicals in our pure well water), so this filter is fine for me and the price is great!