Carbon Replacement Pre-filter for Honeywell Model HPA090,HPA100,HPA104,HPA105 by CFS Carbon Replacement Pre-filter for Honeywell Model HPA090,HPA100,HPA104,HPA105 by CFS Fitted for Honeywell Model HPA090,HPA100,HPA104 & HPA105 (10.7" x 7.4") 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. Made up of nature material, high density coconut shell activated carbon.