2-Pack Replacement Honeywell HRF-APP1 Pre-Filter - Compatible with Honeywell HPA300, Honeywell 50250, Honeywell HPA200, Honeywell 17000, Honeywell 50150, Honeywell HPA100, Honeywell 18155 Replacement Honeywell HRF-APP1 Filter for Honeywell HPA300, Honeywell 50250, Honeywell HPA200, Honeywell 17000, Honeywell 50150, Honeywell 16200, Honeywell HPA100, Honeywell 18155, Honeywell HA200, Honeywell 38002, Honeywell 50300, Honeywell 17005, Honeywell 13520, Honeywell HA300, Honeywell 18150, Honeywell 51500, Honeywell 14000, Honeywell 5250, Honeywell 53000, Honeywell 50100, Honeywell 17450, Honeywell 11520, Honeywell 10500, Honeywell HRF-APP1, Honeywell 83332, Honeywell 83331 Replaces Honeywell HRF-APP1 PreFilter. Quantity: 2 Can be cut to make 1-8 pre-filters depending on model. Filters large particles such as dust, lint, fibers & pet fur. For best results, change air filter at least once per season or more often depending on air quality and use. Essential for Allergy Sufferers. On Sale for a Limited Time!