Product review (1 stars): These do NOT fit!!
These filters do NOT fit!  It seats into the filter housing, but will not turn to lock in place; although, it's the correct filter replacement for model RF266AERS.  This isn't the seller's fault, but Samsung is getting on my *short list* fast... each year, it's a different replacement filter model, which may or may not work!  Apparently, *QUALITY* isn't Samsung's top priority and don't get me started on their sorry Customer Service....