Milwaukee M18 FUEL PACKOUT 18-Volt Lithium-Ion Cordless 2.5 Gal. Wet/Dry Vacuum (Tool-Only) and Extra Filter 0970-20-49-90-1900 - The Home Depot
Fette Filter-HEPA Wet Dry Vacuum Filter Compatible with Milwaukee 49-90-1900. Designed for M18 2 Gallon Wet/Dry Vacuum Model # 0880-20 (Pack of 2) - Amazon.com