Bought a 2 pack of these and then bought a new refrigerator so we never used the 2nd one. 2 pack retails for $60 at Loews. This Project Source M-2-2 (#3846782) replacement refrigerator water filter fits in place of the Whirlpool filter 4. I had a Maytag that it also fit in. Check your worn out filter, this one might do the job for a lot less $$