Sleeve Filter, For Vacuum Type Shop Vacuum, Fits Vacuum Brand Nilfisk, Fits Vacuum Models GWD 120, GWD 220, GWD 255, Filter Pickup Type Wet/Dry, Filtration Type Standard, Filter Efficiency 99.8 Percent at 3 micron, Filter Material Cloth, Filter Reusability Reusable, Height 5 1/2 in, Length 15 1/2 in, Width/Diameter 17 3/4 in