1Double Blade: Magnetic algae scraper has a double headed scraper, durable, a scraper that clean, comprehensive cleaning, saving more effort. 24X Powerful Magnet: Fish tank magnetic brush is designed with hollow inner brush, the brush is suspended and does not sink, and the 4X powerful magnet does not demagnetize for ten years. 3Double Sided: Fish tank magnetic brush has durable inner bristles that won't deform, easy to remove algae, and soft outer bristles that won't hurt the tank wall. 4Ergonomic Handle: Fish tank magnetic brush with ergonomic hand grip shape, frosted texture, non slip design. 5Cautions: Aquarium glass cleaner magnetic powerful, please do not force break open cause accidental injury, separate magnetic brush need to twist 90 degree.