This HAF-CIN refrigerator water filter is used in select Samsung French door and side-by-side refrigerators with filter access inside the refrigerator. Simply turn the filter to the unlocked position (1/4 turn to the left) to remove and replace. While retaining beneficial fluoride, this NSF Certified refrigerator water filter reduces cysts, chlorine taste and odor, particulates (Class I), lead and mercury. For added convenience, all Samsung refrigerators with an external dispenser have an indicator light on the display that reminds you when its time to replace your water filter. Use this replacement filter with your Samsung refrigerator to provide clean, fresh-tasting water and ice from your side-by-side or French door refrigerator. Slim design allows for easy installation and removal; no tools required! For best results, replace your Samsung filter every 6 months.