Universal HEPA filter, filtration efficiency can reach 99.97% under 0.3 micron particle conditions; suitable for incubators such as thermo371, 381, 3423, 3543 and other models! And 311 or Forma3110 series water jacket CO2 incubator; Forma 310 series direct heating CO2 incubator; Forma370 series Steri-Cycle high temperature sterilization CO2 cell incubator; Thermo Scientific Series 8000 direct heating CO2 incubator; Thermo Scientific Series 8000 water Nested CO2 incubator, etc. It is recommended to change this HEPA filter element to the incubator regularly to ensure the cleanliness of the carbon dioxide gas entering the cabinet after filtering to achieve a level of cleanliness in the carbon dioxide incubator!