Product descriptionSize: Small: 9. 5*4. 2*7cmMedium: 11. 8*5. 5*8cmExtra large: 14. 5*7. 5*9cmcolor: blueMaterial: Plastic + MagnetPackage content: 1pcs magnetic fish tank brush1. Includes Replaceable Blade: Stainless steel blade for glass tanks, ABS plastic blade for acrylic tanks. The magnetic brush with blade can clean the aquarium tank more easily and efficiently while keeping your arms dry. 2. Bestie of Aquarium: Magnet makes it easy to clean the inside of the aquariums from the outside, quickly and efficiently cleans tank glass to make your aquarium stays healthy and looks its best. 3. Premium Quality: The scrubber side (inside) is made of fabric with tiny hooks without damaging the glass. Outside, the surface of the handle is covered in felt so it glides smoothly along as you clean. 4. Floating and Easy to Storage: The revolutionary magnetic cleaner features floating function, so you never have to worry about it sinking to the bottom of the tank, and you can retrieve it without getting your hands wet. When not in use, it can be directly adhered to the glass without additional storage. 5. Simple and Durable: Its made of high quality plastic that protects the magnets from rusting. Because of how the fabric is attached, you dont have to worry about it getting sand or substrate stuck in the fibers and scratching the glass while you clean. Its also extremely durable, so it will last a long time.