The internet is full of JUNK FILTERS AND COUNTERFEITS. Poor quality filters can cause more harm than good and contaminate the water passing through them. That is why we only use the most premium food grade materials and verify our effectiveness through NSF, the world leading 3rd party certification company. It is extremely hard to tell which filter companies you can trust, ENTERPRIME IS ONE OF THE FEW. Only the HIGHEST QUALITY FILTERS are supplied here and WE DON'T PRICE GOUGE LIKE OEM COMPANIES!! Stop overpaying for the brand name. Equal quality filter that is NSF certified to reduce up to 28 types of contaminants. Guaranteed Top Quality Product or Free Refund/Replacement: If your filter contains any defect at all or is not perfectly compatible, a free return label will be sent and a replacement/refund will be arranged.