Features: Suitable for EQWF813, EQ-2119-UL; RCM-832N RCM832; PCWF813, 832N; WF813 RWF13 PCWF813 PCWF-813 832N 840; wf813 813; / Robitussin humidifier models 830, 832, 813, 832, D13-C, 832. This filter wick is sturdy, fine, and multiple layer meshes maximizes the moisture output of your humidifier. Easy Installation, Remove the old filter cartridge in your humidifier, put this brand new humidifiers filters in its place and adjust it well. It captures mineral from hard water and distribute moisture more evenly and thoroughly throughout your home. For best performances, it is recommended to repalce the humidifier pads every 2-3 months, depending on usage and water hardness. Specifications: Part number: WF813 Component: Plastic Size: As Shown in the Picture Applicable models: Suitable for EQWF813, EQ-2119-UL; RCM-832N RCM832; PCWF813, 832N; WF813 RWF13 PCWF813 PCWF-813 832N 840; wf813 813; / Robitussin humidifier models 830, 832, 813, 832, D13-C, 832. Package Includes: 6pcs Humidifier Filter note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.