1. Versatile Compatibility: 4839 humidifier maintenance kit compatible with No. 35 Water Panel Humidifier Replacement Filter Model 600 600A 600M Whole Home 600 Series. Package includes: Water Panel (35), Scale Control Insert (4330), Water Distribution Tray (4331), Feed Tube with Compression Sleeve and Nut (4335), Yellow Orifice (4231), Drain Spud (4223), In-line Strainer (4004) 2. Product Specifications: The 4839 A35 filter measures 14. 2 x10. 4 x2. 87 inch. Each set includes 1 humidifier replacement filter, offering users a durable and long lasting experience. Package includes: Water Panel (35), Scale Control Insert (4330), Water Distribution Tray (4331), Feed Tube with Compression Sleeve and Nut (4335), Yellow Orifice (4231), In-line Strainer (4004), Drain Spud (4223) 3. Performance Specifications : The A35 replacement filter is made of aluminum mesh with a porous ceramic sliding coating, which can help you maintain the optimal humidity of 35%-55% at home 4. Application Scenarios: Suitable for humidifier condition systems at homes, offices, and any environment where clean air is needed, it enhances air circulation performance 5. Filter Lifespan: To maintain optimal filtration, it is recommended to replace the filter every 6 months 6. Consequences of Not Replacing: Failure to replace the filter in a timely manner can significantly reduce its filtration performance, affect the overall efficiency of the device, and lead to secondary pollution