Including one Aquarium filter replacement impeller (HW304A/HW304B). Suitable for brand reshaping Installation method: 1. Remove the filter barrel cover outside the cylinder. 2. Rotate and remove the rotary cover in the direction of the arrow. 3. Remove the magnetic rotor in the direction of the arrow and replace it. 4. After replacement, cover and rotate the cover. Precautions: 1. Due to the strong magnetism of the rotor during disassembly, it is necessary to pay attention to safety and wear gloves to avoid damaging fingers when turning into the rotor. 2. This rotor cannot be used in environments containing a large amount of iron filings, fine sand, or hard solid particles. 3. This rotor is not suitable for use in strongly acidic materials. 4. Ensure that the temperature of the medium used is between 0-35 ℃. 5. Pay attention to regular cleaning and maintenance to ensure the normal operation of the rotor. 6. Note that the rotor model can only be used in designated products and cannot be used interchangeably.