Compatible with for HFT600 Series, HEV-600 Series: HEV615, HEV615B, HEV615W, HEV620, HEV620B, HEV620W, HEV-615, HEV-615B, HEV-615W, HEV-620, HEV-620B, HEV-620W. materials: The blue humidifier filter has a diamond-shaped grid structure to the maximum water delivery and water absorption of the product. The newly upgraded blue grid appearance enhances the performance of the product and further ensures the cleanliness of the product. Colour: blue Material: wood pulp paper Package Contents: 2 x Humidifier Filter Only the above package content, other products are not included. Note: Light 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. materials: The blue humidifier filter has a diamond-shaped grid structure to the maximum water delivery and water absorption of the product. The newly upgraded blue grid appearance enhances the performance of the product and further ensures the cleanliness of the product. Compatible with for HFT600 Series, HEV-600 Series: HEV615, HEV615B, HEV615W, HEV620, HEV620B, HEV620W, HEV-615, HEV-615B, HEV-615W, HEV-620, HEV-620B, HEV-620W. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.