Used with Antibacterial materialRemoves minerals and pollutants from water.Fits Model: ECM-250iReplaces part HAC-504, HAC-504AW, HAC504V1.Fits the following Models:HCM-300 Series: HCM-300T, HCM-305T, HCM-305T-CST, HCM-310T, HCM-315T, HCM-350, HCM-350B, HCM-350B-CST, HCM-350W.HCM-450BCST.HCM-500 Series: HCM-530, HCM-535, HCM-535-20, HCM-540, HCM-550, HCM-550-19, HCM-551, HCM-560.HCM-600 Series: HCM-630, HCM-631, HCM-632, HCM-632TG, HCM-635, HCM-640BW, HCM-645, HCM-646, HCM-650.HCM-700 Series: HCM-710.HCM-1000 Series: HCM-1000, HCM-1000C, HCM-1010.HCM-2000 Series: HCM-2000C, HCM-2001, HCM-2002, HCM-2020, HCM-2050, HCM-2051, HCM2052.HEV-312, HEV-355.colour:whiteMaterial:Composite materialPackage Contents:6 x humidifier filterOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.