Cartridge Filter, For Vacuum Type Drum Head Vacuum, Fits Vacuum Brand Nilfisk, Fits Vacuum Models GWD255, Filter Pickup Type Wet/Dry, Filtration Type Standard, Filter Efficiency 99.8 Percent at 3 microns, Filter Material Paper, Filter Reusability Reusable, Height 8 in, Length 8 in, Width/Diameter 8 in. This item has been restricted from sale in the following state (s): []