The Leybold Exhaust Mist Filter AF 63-90 is a Leybold replacement exhaust oil mist filter assembly for Leybold rotary vane vacuum pumps. It captures oil aerosol from the pump exhaust, preventing oil mist discharge into the laboratory environment and maintaining a clean workspace during distillation operations. The AF 63-90 model is compatible with the corresponding Leybold vacuum pump series used on VTA and UIC wiped-film distillation systems. Replace the filter element regularly to maintain effective oil mist separation.