Tier1 Replacement for Bionaire 900 Models C22, C33, W2, W6, W6S, W7 Humidifier Wick Filter 2 Pack DESIGNED TO FIT: Fits Bionaire humidifiers requiring 900 filter, models C22, C33, W2, W2S, W6, W6S, W7, W9, W9H, W9S, W25, W0210, W0210S, W0305, W0310, W0340, W3040, WC0840, WC2845. ACTUAL SIZE: 9-1/2 inches (height) x 6 inches (width) x 1-1/2 inches (depth) HIGH EFFICIENCY FILTRATION: Reduces pollutants from the water used in your humidifier to produce better air quality by maintaining humidity levels during dry seasons. FILTER LIFE: For optimum performance, replace every 3 months 100% TIER1 NO WORRIES GUARANTEE: We stand behind the quality of filtration and overall performance of our Tier1 filters! Reduces static Eases cold and allergy symptoms Soothes sore throat and dry, irritated skin Creates a comfortable living environment Reduces chance of nose bleeds Alleviates snoring for better sleep Bionaire-900 RB-B900 TIER1-HMF1570