Fangrui Product Details Broad Compatibility: Our Wf813 Humidifier Filters Are Designed To Be Highly Versatile And Are Compatible With Various Models. They Are An Choice For Wf813, For Eq-2119-ul Eqwf813, For Pcwf813 Pcwf-813 Pccm-832n Pccm-840, For Relion Rcm-832 Rcm-832n, For , For Robitussin Humidifiers And Sh100 Sh200. Precise Dimensions: This Filter Measures Approximately 5.51 X 3.86 X 1.5inches. Its Recommended To Compare The Size With Your Old Humidifier Filter For Fitting. Effortless Installation: Owing To The Of These Filters, Replacing Your Old Filter Is A Breeze. Simply Discard The Old One And Fit This New One In Its Place. To Maintain The Performance Of Your Humidifier, We Recommend Changing The Filter Every 2-3 Months. Premium Quality: We Utilize A Natural Multilayer Hydrophilic Fabric In The Making Of Our Humidifier Filters. This Ensures Excellent Moisture Output While The Incorporation Of Aluminum Foil In The Middle Provides Enhanced Stability And Durability. These Filters Give A