ABASSKY Magnetic Brush Aquarium Fish Tank Glass Algae Scraper Cleaner Floating Curve Material:Plastic and high magnet material Suitable for use with varying glass thickness. The streamline design is so artistic and pleasing to the eye. Non slip griped handle for improved cleaning action, while anti-scratch cleaning pads are highly efficient in removing algae from glass. Magnetic force available between less than 6mm Floating design avoids lost magnets on the bottom of your aquarium and makes it convenient for use.