Aquafresh WF277 Replacement for WaterSentinel WSG-4, GE-RPWF Refrigerator Water Filter (3 Pack) EASY TO FIT: Designed to fit the original. Easy for installation and operation. No tools required. AFFORDABLE OPTION: Costs less than OEM filters without compromising any quality or flow rate. CERTIFIED QUALITY: All Aquafresh Filters are tested and certified by IAPMO to NSF Standard 42 for Structural Integrity, Materials Safety, Chlorine taste, odor reduction and System performance. Quality you can taste! HIGH EFFICIENCY FILTRATION: Activated carbon blocks certified to ensure contaminant reduction for 300 Gallons Or 6 Months, depending On Water Usage And Quality FITS: GE RPWF (Not RPWFE), Water Sentinel WSG-4, PYE23KSD, GNE26GSD, Dista DWF-36, Refresh R-3600, EXCELPURE EP-RPWF, Tier1 RWF1063, ICEPURE RWF3600A (See product description below for complete list of compatible models)