Nilfisk Advance Spectrum 18D - Upright VacuumProduct Description The Nilfisk Advance Spectrum 18D Upright Vacuum delivers superior pickup and filtration, with the power to pull dirt and dust from carpets in a single cleaning pass, resulting in greater productivity. The innovative design of the Spectrum power head creates a seal with the carpet surface to agitate and capture dirt and dust that other vacuums miss. This design has earned the Carpet & Rug Institute (CRI) Seal of Approval, meeting