Okay, listen up if you have an LG, Kenmore, or several other fridge brands - keeping your water and ice clean is important, and this PUREPLUS 3-pack of replacement filters makes it easy and affordable. This filter is a direct replacement for a ton of model numbers, most commonly the LG LT600P and the Kenmore 9990 (seriously, check the huge list in the description to see if your fridge is there). It's certified by NSF/ANSI 42 to reduce chlorine, bad tastes, and odors, and it's lead-free compliant. Basically, it makes your water taste way better and gets rid of that weird fridge-water smell. The filter uses a multi-layer coconut shell carbon block technology to trap contaminants. They recommend changing it every 6 months, and getting a 3-pack means you're set for a year and a half - smart! Installation is usually pretty simple: twist out the old one, twist in the new one. They say you might not need to turn off the water, but it can help if it's stuck. Always flush the new filter by running water through it for a couple minutes and tossing the first few batches of ice. A must-have for anyone who drinks water or uses ice from their fridge. Don't wait for the flow to slow to a trickle - change it regularly!