RELIABLE: we produce deliver the filters straight to you. No intermediates, no risks. This is the most NSF certified product on the market, NSF 53 for Healthy effects by the reducing Cadmium, Copper & Mercury. NSF 42 for positive Aesthetic effects for the reduction of Chlorine (taste & odor) and Zinc. NSF 372 for a lead free compliance. CLEAR: we are proud to publish NSF Performance Certified by WQA without needing to be ask for it. The water tastes better but most important you can be sure it works against chemicals and harmful synthetics being also tested by an independent laboratory. CONVENIENCE: This filter is certified to last for 42 gallons, which is more than our competence. The filter has a rubber ring around its body to avoid leaks. Fits perfectly in Brita's and most pitchers brands. HEALTHY: Water is the most important element in every diet. Use filtered water for drinking, preparing coffee, tea, cooking, filling ice cubes and feeding our pets and plants. We have developed a quality product so you can supply your family with truly healthy water at the best price. MAKE A DIFFERENCE: we donate a percentage of your purchase to NGO's around the world to preserve fresh water for our children. You will be providing clean fresh water to your family now and for the future to come. The decision is on you. Try us, we are 100% money back guarantee.