HIGH PERFORMANCE & QUIET OPERATION: Provide efficient air circulation in your fish tank while maintaining a quiet operation, ensuring a peaceful environment for both you and your aquatic pets. ENHANCED AIRFLOW & CIRCULATION: The four-blade design ensures optimal airflow and water circulation within the tank, preventing stagnant areas and improving oxygen levels. MULTI-ANGLE ADJUSTABLE FOR OPTIMAL AIRFLOW: The multi-angle adjustable positioning ensures that every corner of your aquarium receives adequate ventilation. & LONG-LASTING CONSTRUCTION: It is to and wear, ensuring reliable performance over time even in the humid conditions of a fish tank. EASY INSTALLATION & COMPATIBILITY: The kit includes an adapter that fits a 25MM inner diameter outlet, making it easy to install, and compatible with most standard fish tank setups. REMOVABLE DESIGN FOR EASY MAINTENANCE: Simply detach the unit for thorough cleaning without the hassle of disassembling your tank setup, making cleaning and maintenance a breeze. Specification:A:fit 25MM inner diameter Colour:Red & Gray Material:plastic Package Contents: 1 * Auto-Rotating 4-Blade Fan Kit 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.