4-Pack Replacement for Honeywell HPA100 - HPA109 Sizeeries Air Purifier Pre-Filter - Compatible with Honeywell HRF-APP1 PreFilter

4-Pack Honeywell HPA100 - HPA109 Series Humidifier Filter - Replaces Honeywell HRF-APP1 PreFilter. . Please check your filter to make sure it matches the image and description before ordering.