AL 8-24-04139-2 / 56382789 Panel Air Filter for Nilfisk-Advance / American Lincoln Sweepers and Sweeper/Scrubbers. Pleated, water washable, spun-bond poly synthetic hopper filter for trapping dust particles. Galvanized steel frame with gasket on one side. Measures 18 x 30 x 3.75" (3.75" wide with included gasket). Fits many Nilfisk-Advance and American Lincoln models including 2160, 2160XP, MPV-60 (without Pulse Air option), Exterra, Proterra, SR 1900, SW 8000 and many other models. Please check your unit before ordering. Most models require 1 panel air filter. If a standard paper filter is needed, search for 8-24-04139-1. It is recommended to allow these filters to completely dry before re-installing. Replaces Nilfisk-Advance American Lincoln 8-24-04139-2, 56382789. Our Part Number AL 8-24-04139-2