The Cleanspace Combined Filters are suitable for protection against airborne particulate dust, mists and fumes, organic, inorganic and acid gases or vapors boiling point greater than 65C. Clean Space CST Combined Filters are compact. They clip easily and directly into the Clean Space PRO Power Unit (CST1002) and Clean Space ULTRA Power Unit (CST1012). No adaptor is required. Clean Space CST filters are enabled to collect filter usage data which can be accessed by the Clean Space Smart App.Filter and filter cover integrated into a single itemEasy to fit and remove from the power unit using snap in/snap out clipsNo requirement for a filter adaptor