ARG06DTC3903 is a Viking refrigerator water filter. It is designed to reduce contaminants such as chlorine, lead, mercury, and many other common contaminants that can be found in the water supply. The filter also reduces unpleasant odors and tastes, giving you clean, filtered drinking water. It is compatible with several Viking refrigerator models, including the Viking VCSB536DS, VCSB536DD, VCSB542D, VCSB585SS, VCSB585DD, VCSB574D, and VCSB575SS.