PERFECT COMPATIBILITY: The 990-13 Humidifier Vapor Water Pad Filter GFI #7002Compatible with General Aire 990-13 Humidifier Replacement Evaporator Pad Media Filter for Models 709 990 1040 1042 1137 SL16, Compatible with Williamson humidifier Models 400, 500 and Hamilton Model 10HF, 10-HF,ensuring a seamless fit and optimal performance. ENHANCE AIR QUALITY: This 990-13 humidifier vapor pad effectively does a very good job of filtering out the hardness minerals in the water and prevents a white powder from entering the room air and depositing on everything in sight. HIGH-QUALITY MATERIALS: Our 990-13 Replacement Evaporator Filter Pads is made of multi-layer mesh humidifier cartridge and aluminum foil layer. High quality absorbent reinforced mesh paper material, offering you a reliable solution for maintaining a comfortable indoor environment. Colour:As Shown Material:plastic Package Contents: 2 * filter Only the above package content, other products are not included. Note: Light reflection 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.