Tier1 Replacement for Holmes HWF23CS Models HM1200, HM1250, HM1206, HM1200TPK1 Humidifier Filter 2 Pack DESIGNED TO FIT: Fits Holmes humidifiers requiring HWF23CS filter, models HM1200, HM1250, HM1206, HM1200TPK1 ACTUAL SIZE: 4-19/50 inches (height) x 7 inches (depth) x 2-1/4 inches (depth) HIGH EFFICIENCY FILTRATION: Reduces pollutants from the water treated to inhibit the growth of mold, bacteria, algae, and fungus 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 HMF1600 RB-HL23CS TIER1-HMF1600 UFHWF23CS