The Bemis 1041 is the correct compatible replacement wick filter for the following humidifier models:
The Bemis 1041 Replacement Humidifier Wick Filter is a compatible humidifier filter replacement for the Bemis 400, 500, 600, 4000, and 6000 humidifier models. This Bemis humidifier filter is reinforced with metal for increased durability and efficiency than other similar filters. With this Bemis waterwick filter you can remove minerals from your water and boost stability with its soft and absorbent paper.
This humidifier wick filter is coated with anti-bacterial treatment and prevents "slumping" or "sagging," which can occur over time when the filter becomes wet. This replacement humidifier filter also adds rigidity to the shape of the wick filter when moistened, resulting in higher efficiency for your humidifier.
Bemis 1041 Replacement Humidifier Wick Filter specifications: