This humidifier filter is designed to prevent growth and migration of mold,, algae, and bacteria. It is made of high-quality wood pulp paper, very safe and healthy to use. 2 types humidifier filter could be for you to choose to match your humidifier, HU4101 is suitable for HU4901/HU4902/HU4903, HU4136 is suitable for HU4706/HU4701/HU4702/HU4703.
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