Carbon Replacement Pre-filter for Honeywell Model HPA200 & HPA204 Perfectly fitted for Honeywell Model HPA200 or HPA204. (Not come up with Universal Size). The pre-filter has a dimension (mm) Length 353 X Width 286 X Thickness 5. No need to make any further cutting, it saves your effort and avoid messy jobs. Help to capture certain airborne germs, remove unpleasant odors and allergies. It has the ability to filter off a room size of around 310 sq.ft. Made up of nature material, high density coconut shell activated carbon.