REPLACEMENT FILTER # WF-DA29-00020B. IT FITS MY SAMSUNG REFRIGERATOR WITH WATER DISPENSOR, WHICH I NO LONGER HAVE. SELLS FOR $55 EACH, BUT YOU CAN BUY IN BULK FOR A LESSER UNIT PRICE. NEVER USED, OF COURSE, STILL SEALED IN CELLPHANE. I BOUGHT IT ABOUT 8 MONTHS AGO.