AO Smith Clean Water Single-Stage Fridge Filter - Carbon Block Filtration

AA-FF AO Smith Clean Water Single-Stage Fridge Filter - NSF Certified Carbon Block Filtration ** The wrench is missing from the box. Advanced Filtration - Reduces up to 99% of 77 harmful contaminants, including lead, mercury, asbestos, pesticides, pharmaceuticals, chlorine, etc. Claryum filtration reduces harmful contaminants – those you can see, smell, and taste, and those you can’t – for optimally clean water. The filter lasts 200 gallons or six months. Easy Installation - Clean water right from your refrigerator/freezer whenever you need it. Entire system NSF Certified to standards 42, 53, and 401 +P473. Includes system, one Claryum filter, and all parts necessary for installation. No plumber is required.