Protec Extended Life Humidifier Wicking Filter Cartridge, PWF2 Sale! from 989 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Strong Antimicrobial Protection Premium aftermarket replacement, designed by AFB in the USA. AirFilterBuy: Breathe Better This humidifier filter is designed to prevent growth and migration of mold, fungus, algae, and bacteria Qty available:8 Tweet