1900 Little Wonder, 5511-02-01 Vacuums, Pro Vac SI Outdoor Vacuum Superior Suction Makes Parking Lot, Leaf and Debris Clean-Up a Snap Serrated Steel Impeller Blade Technology with up to a 5:1 reduction ratio delivers superior suction and shredding capabilities in a compact footprint. Keep your pace going with instant easy nozzle height adjustment from the operators position. Youll get non-stop, efficient pavement-to-turf transition for faster parking lot and leaf cleanup.