We humidifier filter, made of natural fabric, multi-layer mesh surface to maximize the output of humidifier moisture, also better filter Limescale, the new upgraded material makes the filter more stable and filtering, can be used for a time. Including for Relion WF813 RCM-832 RCM-832N,for PCWF813 PCWF-813 PCCM-832N PCCM- 840,for EQ-2119-UL,for SH100 & SH200,also compatible with for / Robitussin humidifier models -830, -832, AC-813, ACR-832, D13-C, -832, etc. Easy Installation,Remove the old filter in your humidifier, put this brand new humidifiers filters in place and adjust it well. Normal use 1-3 months need to be replaced with distilled water or cold water to fill the tank, not hot water. Premium Filters: Made of environmentally friendly professional import heap filter paper, to help you the most out of your humidifier. Premium filter stop white dust from hard water, keep air moist and make the air feel warm. Made of high quality material, more durable. Material: Plastic colour: white Package Contents: 6 x Humidifier Filter Only the above package content, other products are not included. Note: Light reflection 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.