Two stainless steel replacement blades to be used in the Flipper Nano Magnetic Aquarium Algae Cleaner on glass tanks up to 1/4" (6mm) thickness. These stainless steel replacement scraper blades are designed with an ultra low profile making it easy to clean the hard to reach areas of the tank! Blades are interchangeable and replaceable. For use in the Flipper Nano Magnetic Cleaner on glass tanks up to ¬ (6mm) thickness Includes two stainless steel replacement blades Complete cleaning without ever getting your hands wet!