Provide a second level of HEPA Filtration to meet United States Pharmacopeia (USP) <800> standard for redundant HEPA Filter in series. Each Kit includes one HEPA Filter, set of bag and straps for bag-in/bag-out system, complete metal support system, as well as certifier installation instructions. Kit adds 12.9" inches to height of an existing System. Contact Labconco for optional Canopy Connection for use with this Kit.