The SafeGuard 360 Ultrafine H12 Patented Filter Cartridge, US Patent No. 7,048,773, is manufactured in the USA. The SafeGuard 360 filter is 88 percent efficient at 0.3 microns and the cartridge design makes the filter safe, simple, and secure. Safe The SafeGuard 360 Ultrafine H12 filter cartridge provides safety to the user as the hose connects directly to the filter cartridge, allowing a completely closed system. The Ultrafine filter is 88 percent efficient at 0.3 microns or larger and can handle toner, color toner, dust, and debris. The SafeGuard 360 filter cartridge comes with a filter plug to eliminate exposure from leaking or spilling of vacuumed contents during transport and storage. Simple The SafeGuard 360 filter cartridge is designed for quick and easy filter change outs. There are no secondary or tertiary filters to change, eliminating cross contamination. The filter cartridge is designed to be replaced when full. By sealing the filter with the provided plug, you can easily and safely remove the filter cartridge by the easy pull tabs located on the ends of the cartridge. Secure No bags, no mess, and no exposure to the dust, debris, or toner within your vacuum. When finished cleaning, you can feel confident debris was captured and secured within the filter cartridge keeping the user safe and the vacuum clean. The one-gallon filter cartridge is designed with 43 cellulose pleats. The pleated material is designed to hold more debris and secure the particles within the cartridge. SafeGuard 360 Ultrafine H12 Filter Cartridge SKU: 31700-1P All SafeGuard 360 filters are compatible with the Omega Series vacuums.