F&P refrigerator water filter. Bayonet type fitting (not threaded), please check the length and fitting before ordering as some models were fitted with both types. Length of cartridge (barrel of filter) only is 240mm. Model listings: E402BRXFDU5 (25529-B, 25529-C), E442BRXFDU5 (25548-B, 25548-C), RF402BRPUX6 (25564-B, 25564-C), RF442BRPUX6 (25582-B, 25582-C), RF522ADUB5 (25598-B, 25598-C, 25598-D), RF522ADUX5 (25441-B, 25441-C), RF522WDRUB5 (25402-C, 25402-D), RF522WDLUX5 (25464-B, 25464-C), RF522WDRUX5 (25476-B, 25476-C), RF610ADUB5 (25599-B, 25599-C, 25599-D), RF610ADUX5 (25493-B, 25493-C), RS90AU1 (25348-C, 25839-A), RS9120WRU1 (25846-A), RF605QDUVB1, RF605QDUVX1, 26376-A RF442BRPUX6