Presenting KENT Sapphire-B Mineral ROTM Water Purifier. It uses futuristic and state-of-the-art technology to provide purer and healthier drinking water. At the heart of KENT Sapphire-B Mineral ROTM Water Purifier is a Reverse Osmosis membrane with capillaries as small as 0.0001 microns that reduce even dissolved impurities (salts and heavy metals) and even converts hard water to sweet and purer drinking water. The KENT Sapphire-B Mineral ROTM Water Purifier also allows the user to control the Total Dissolved Solids (TDS) level of purified water.