Compatible with: Designed for Bionaire models 900, 900CS, and 900CS, ensuring a fit for your humidifier without the need for modifications. Specifications: Measuring 9 inches x 71/4 inches x 25/8 inches, this filter matches the original dimensions for performance and easy replacement. Package Includes: Set of 4 quality humidifier filters, providing multiple replacements to keep your unit running efficiently for extended periods. Reliable Material: Constructed from durable, safe, and dependable materials that resist breakage and fading. This ensures a long service life and maintains effective humidification over time. Easy to install and remove, requiring no special tools. Key Benefits: Maintains moisture levels in your home environment. Helps reduce dry air discomfort such as dry skin, irritated sinuses, and static electricity. Supports cleaner, fresher air by trapping impurities before they circulate. Usage Scenarios: 1. Ideal for use in bedrooms to maintain comfortable humidity for better sleep and respiratory health. 2. Suitable for living rooms to protect wood furniture and flooring from drying and cracking. 3. for home offices to improve air quality, reducing static and helping preserve electronic equipment. By choosing this replacement filter set, you ensure your Bionaire humidifier continues to function efficiently, providing consistent and reliable air moisture control with minimal effort.