75Pack Filter Rod Set Provides extended usage supply and maintains consistent humidifier performance for longterm satisfaction. Key features Dual CottonSponge Composite Material Ensures efficient water absorption and stable vapor diffusion for balanced humidity. Universal USB Humidifier Compatibility Fits most mist makers and aroma devices for versatile application. EasySwap Wick Design Simplifies maintenance and saves time with tool replacement convenience. Use scenarios Home use Pair with a USB powered mist maker or aroma diffuser in a bedroom, living room, or nursery to help maintain comfortable humidity and consistent fragrance diffusion. Office or work desk Use with a desktop USB humidifier to improve air quality during long work sessions and reduce dry air effects. Travel or small spaces Carry with portable USB diffusers to ensure easy replacement and steady performance in compact environments.