CERTIFIED AND TESTED: Tested and certified by NSF International against NSF/ANSI Standard 42 for the absorption of chlorine taste and odor. REPLACEMENT CYCLE: To achieve optimal performance, change your filter every 6 months or 300 gallons. PREMIUM MATERIAL: Uses high-grade natural coconut shell activated carbon block as filtration material, which features better adsorptive ability and better filtration performance with microscopic pores. HIGH QUALITY: Easy to install and quick to change. High quality, cost-effective alternative to factory original. COMPATIBLE MODELS: WHIRLPOOL 4396508, EveryDrop Filter 5, 4396508P, 4396508T, 4396509, 4396509P, 4396510, 4396510P, 4396510T, 4396547, 4396548, 4396562, 4396563, 4396918, 4392857, 4392857R, 4392922, 4396163, 4396164, 46 9902, 46 9908, 9902, NL240, WSW-1, 4396547, 4396548, 4396163, 4396164, 2255709, 4396509, 2203220, EDR5RXD1, 2255518, 9010, 9085, 90102, 9010P, 9908, 2203221, 2203980, 2255520, 8212491, 2200203, 2255519, 8212652, WF-300BR, NL300, 9908P, 4396919, 22032200, WATER SENTINEL WSL-2. EcoAqua EFF-6002A Replacement Filter, Replacement for Whirlpool 4396508, 4396510, Kenmore 46-9010, EveryDrop Filter 5, NLC240V, EDR5RXD1, 3 Pack CERTIFIED AND TESTED: Tested and certified by NSF International against NSF/ANSI Standard 42 for the absorption of chlorine taste and odor. REPLACEMENT CYCLE: To achieve optimal performance, change your filter every 6 months or 300 gallons. PREMIUM MATERIAL: Uses high-grade natural coconut shell activated carbon block as filtration material, which features better adsorptive ability and better filtration performance with microscopic pores. HIGH QUALITY: Easy to install and quick to change. High quality, cost-effective alternative to factory original.