Easy to Install - No tools required, just insert the water pipe into the filter plug and the installation is completed. Long-Term Use - Please drain approximately 4 gallons of water after replacing the filter to achieve the best filtration effect. Please replace every 6 months or after filtering 200 gallons of water to minimize impurities. Selected Material - Made of high-grade natural coconut shell and activated carbon block, which has stronger adsorption capacity and better microporous performance. Compatible Models - Filter 1 is compatible with EDR1RXD1, W10295370, W10295370A, W10276924, W10291030, WRL767SIAM, WRS322FDAB, WRS325FDAB, WRS526SIAH, WRS537SIAB, P4RFWB, P5WB2L, PS2378001, 46-9930, 46-9081. Key Features: 1) NSF certified to reduce 28 contaminants including lead, pesticides and pharmaceuticals. 2) For clean, fresh tasting water, replace your water filter every 6 months. Replaces 1500 Plastic Water Bottles.