Filters bacteria and scale present in the water before they enter the air. The 30 mm thick cellulose fiber filter made up of 12 layers ensures efficient and consistent humidification performance for up to 6 months per filter 12-layer honeycomb structure to achieve optimal water absorption and evaporation efficiency. Compatible with Philips humidifiers HU4801/01, HU4803/01, HU4803/70, HU4811/10, HU4811/30, HU4811/60, HU4811/90, HU4813/10, HU4814/10 - Compatible with FY24 01 filter /30 (replaces FY240) 1/10) Package contents: 5 humidifier filters Note: The data is all measured manually, please allow 1-3cm error due to differences in light and display, there may be color differences, please refer to actual item received. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!