Fangrui Product Details Compatible Models: Our Wf813 Humidifier Filter Parts Are Compatible With: For Relion Wf813, Dh830 Dh-830, Dh832 Dh-832, Rcm832 Rcm-832, Rcm832n Rcm-832n; For Equare Eq-2119-ul, Eqwf813; For Procare Acare 813, 813, Cm-832n,pcwf813 Pcwf813-24; For Robitusin Dh-832; For Duracraft Dh-830; For Protec Wf813 Wf-813. Enhanced Filter: Made Of Filter Paper Imported From Environmental Protection Specialty. Size: 5.8x3.5x1.5 Inches. We Added Aluminum Foil Material In The Middle Of The Filter Element To Prolong The Life Of The Filter. Strong And Fine Mesh Is Not Easy To Fold And Can Be Used For A Long Time. Simple Installation: Just Remove The Old Filter And Put This Brand-new Filter In Place. For The Effect, We Suggest That You Fill The Humidifier Water Tank With Distilled Water Instead Of Hard Water. Package Content: 6 X Wf813 Humidifier Filter Element . Replacing The Filter Element Is Quick And Easy. The Filter At The Beginning Of Each Season Or Every 2 Months To Increase The Hu