Premium push button refrigerator water filter, used in side by side refrigerators with filter access in the interior or grill, blue cartridge, nsf certified filter reduces cysts, asbestos, chlorine taste & odor, particulates class i & lead, contaminants or other substances removed or reduced by this water filter are not necessarily in all users water, replace every 6 months ensures clean, safe drinking water, replaces filter2, w10413645.