Cartridge Filter, For Vacuum Type Shop Vacuum, Fits Vacuum Brand Milwaukee, Fits Vacuum Models 0910-20, 0911-20, 0920-20, 0920-22HD, 0921-20, 0930-22HD, 0931-20, Filter Pickup Type Wet/Dry, Filtration Type Standard, Filter Efficiency 99 Percent at 0.5...