Oasis 033879-001 VersaFiller Filter Cartridge. Filter cartridge. For Oasis VersaFiller series. Easy to install. Thread to cap. Replacement part. For more than 100 years, OASIS International has innovated, engineered, manufactured and distributed some of the world's best clean drinking water solutions. We're the recognized worldwide leader of bottled and pressure water coolers and provide point-of-use filtration equipment, drinking fountains, dehumidifiers and water pitcher systems to offices, schools, businesses, hospitals, municipal buildings and homes. We deliver water-friendly solutions to more than 80 countries across the Americas, Europe, Asia, Africa and the Middle East. We're known by some of these brand names: Aqua Pointe, Versacooler, Freshshield and Green Filter. Our goal: to provide clean, refreshing drinking water to the planet that is free from harmful bacteria, viruses, sediments, metals and chemicals. Oasis International is headquartered in Columbus, Ohio, U.S.A., with facilities in Mexico, Ireland and Poland.