Product review (1 stars): NO Bargain...adds contaminates to water!!
These filters (I tried three) all contained crushed Coconut pieces acting as a filter and the pieces contain black fine strands from the exterior of the shells. These particles remain suspended in the water you use from the refrigerator. My water had these particles for a month or more.
The GE filters doesn't use the same filter materials so at least you aren't adding new contaminates to your water.
I sent my Water Sentinel 3pk. back and bought GE. Price does not excuse this kind of problem!!