Wolff Pre Seperator for Hepa VacThis powerful pre separator collects large dust and debris, and keeps the filter on your vacuum from getting clogged as quickly. It is perfect for use with monodisc grinding machines, saws, hand held sanders, and can be used for vacuuming with a floor nozzle. Solid construction with wheel dolly for easy transport. Good for collecting large dust and debris Provides constant suction power Protects vacuum cleaner and filter Particle separation rate up to