About This ✅ UNDER SINK WATER FILTER: The Smart Shield sets the standard for water filter under sink category on Amazon. It is the perfect home water filter. 🔧SIMPLE DIY INSTALL: No plumber, No third faucet hassle or holes to drill in your counter. The Smart Shield connects directly to your kitchen sink's cold water line. It only takes a few minutes. All you need is an adjustable wrench and a standard Phillips head screwdriver. This makes the Smart Shield the perfect under counter water filter. ✅ TAP WATER FILTER: Solid carbon block water filter uses depth & adsorption filtration to achieve sub 1 micron contaminant removal. Adsorption removes water particulates via the activated coconut carbon surface areas, which adsorbs contaminants such as cysts, heavy metals, chemicals, pharmaceuticals & herbicides as they try to pass by. Depth filtration (2" thick) involves the removal of suspended waste products as they try to pass by the millions of layers of activated coconut carbon block. ✅ INLINE WATER FILTER: The Epic Smart Shield is the perfect inline water filter for house but can also be configured to work as an inline water filter for refrigerator. 3rd Certified against NSF/ANSI 42, 53, and 401. Compare our 3rd party testing to other brands in the category Under Sink Water Filter and you will notice the Smart Shield is the only filter in this group certified to 3 different NSF/ANSI drinking water standards. ✅ WATER FILTRATION SYSTEM UNDER SINK: The Smart Shield is the perfect under sink water filtration system. It is the ideal kitchen sink filter for well water because it removes bacteria and cysts. BACTERIOSTATIC WATER FILTRATION SYSTEM: Unlike carbon only filters, the inline water filter Smart Shield is bacteriostatic and not susceptible to mold or bacteria growth making it the ideal water filter for sink. This water purifier will keep your family drinking clearly filtered water. Overview Material : Carbon Product Dimensions : 4.5"D x 4.25"W x 19.5"H Item Weight : 2.6 Pounds External Testing Certification : NSF/ANSI 42, 53 & 401 Product Benefits : Reduces PFAS