K EXCLUSIVE Czech Military Surplus Aluminum Mess Kit Completely compatible with the size of your refrigerater water filter and no tools needed to replace refills inside the refrigerator, and it only takes a few minutes even less than one minute to finish installation Easy to Install - Quick installation and easy replacement-replace every 6 months. Detailed specification is included Pharmaceutical Reductions Certified by NSF Pharmaceutical and contaminant reductions are certified by NSF including waterborne parasites, lead and pesticides. Effectively reduces over 99% of potentially harmful contaminants, chlorine taste and odor, while retains minerals which may be beneficial to health. The quality of the filter is the same as the branded filter but costs less. Our high-quality refrigerator water filter will continue providing clean and fresh water in 4-6 months or 200 gallons healthy service life