Compatible with HFT600 humidifier wick filter, designed for HFT600T, HFT600PDQ, and T-type filters. Fits HFT600 series and HEV-600 series models: HEV615, HEV615B, HEV615W, HEV620, HEV620B, HEV620W, HEV615, HEV-615B, HEV-610W, HEV-620B, HEV620W. High quality humidifier wick filter made from premium materials. Constructed with durable, fine, multi-layer mesh and natural hydrophilic fabric to maximize moisture output. Easy to install: Fill the humidifier tank with distilled water for best results. To replace, open the humidifier cover, remove the old wicking pad, insert the new wick filter in the same position, and secure the cover. For optimal performance, replace the humidifier pads every 2–3 months depending on usage and water hardness. Effectively captures minerals from hard water and distributes moisture evenly. Humidifier pad refill pack includes replacement filters. Material: Wood pulp paper Color: White Package Contents: 6 x Humidifier replacement filters Note: Light reflection and display settings may cause slight color variations. Measurement may vary by ±1–3 cm.