Compatible Honeywell Odor-Reducing Air Purifier Replacement Pre-Filter 2 Pack, HRF-B2 /Filter (B) by CFS Compatible Honeywell Replacement Chemical and Odor-Reducing Pre-Filters B for Air Purifiers - 2 Pack by CFS Package Quantity: 2 Features: Odor Filter, Carbon Filter Filter Size: 20x4.3x0.25 Compatible With: Honeywell air purifiers For use with Honeywell Air Purifier models HHT-090, HHT-011, HHT-145, HPA-150 and HPA-050