Easy to Install – No tools required, just insert the water pipe into the filter plug and the installation is complete and can be used directly. 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 4 Compatible with UKF8001, EDR4RXD1, EDR4RXD2, EDR4RXD1B, 4396395, UKF8001AXX-750, UKF8001AXX-200, UKF8001P, UKF9001, FMM-2, RWFFR, BORPLFTR20, 46-9006, 46-9005, 46-9992, 9084, Puriclean II, WF295, 67003523-750, WF50.