This unit features an optional Longo-Pac model as well. The ASL Pre-Separator is designed to extend the lifetime of your vacuum's filter by working as an extension between your grinder and your vacuum. The Pre-Separator collects 95% of dust and debris before it reaches your vacuum, keeping the vacuum filter clean. The Pre-Separator saves time and money by allowing you to grind longer without having to clean out or replace the vacuum filter as often. The 16 gallon tank and easy maneuverability create a hassle free way keep your vacuum in good condition. Model Pre-Separator Weight 35 lbs Dimensions 30" X 16"