FilterBuy Humidifier Wick Replacement Filter for WF2 Vicks. Compatible with Vicks humidifier Models V3100, V3500, V3600, V3700, V3800 and V3900. Designed by AFB in The USA FilterBuy WF2 Vicks Replacement Humidifier Wick Filter. Designed to fit models V3100, V3500, V3600, V3700, V3800 and V3900 This humidifier filter is designed to prevent growth and migration of mold, fungus, algae, and bacteria Premium aftermarket replacement, designed by AFB in the USA. FilterBuy: Breathe Better!