The Milwaukee HEPA filter works on the M18 FUEL 3-in-1 backpack vacuum (0885-20, 0885-21HD). The HEPA filter captures 99.97% of all particles greater than 0.3 microns for fine dust collection. The 49-90-1963 contains (1) HEPA filter.

(1) Milwaukee 49-90-1963 HEPA FILTER