The Camfil 405619D12 is a 20 x 20 x 12 Hi-Flo ES filter. It is a high-efficiency bag air filter with a low pressure drop and a long service life guarantee. The Hi-Flo ES filter is optimized for dust holding and is exclusive to Camfil. Camfil air filters can help protect sensitive manufacturing processes, prevent microbiological contamination, and eliminate infectious airborne contaminants.