1、[Fitment] This humidifier filter is fit for Holmes HWF75 HWF72 HM850, HM3300, HM3400, HM3500, HM3501, HM3600, HM3607, HM3608, HM3640, HM3641, HM3650, HM3655, HM7600, HF221, HSL5000. 2、[Eco Friendly Material] Made of high quality paper material, which is safe, environmentally friendly and durable. 3、[Effectively Filter Impurities] Humidifier filter replacement can effectively filter impurities and maximize moisture output. 4、[Replacement Frequency] According to the frequency of use, it is recommended to replace it every 2‑3 months to ensure that the machine runs in the best condition. 5、[Widely Application] Easy to install and replace, it is a perfect accessory for humidifier, easy to use, widely used in bedroom, living room, office, etc. 1 x Humidifier Filter Item Type: Humidifier FilterMaterial: PaperFitment: Fit for Holmes HWF75 HWF72 HM850, HM3300, HM3400, HM3500, HM3501, HM3600, HM3607, HM3608, HM3640, HM3641, HM3650, HM3655, HM7600, HF221, HSL5000Weight: Approx. 190g / 6.7oz