Description: The S/M/L fish tank brush can be used to fish tanks with a glass thickness is less than 5/8/10 mm. Simply stick the two parts together through your aquarium’s plexiglass. Care for your fish tank and provide your aquarium animals and plants with a clean environment. Features: [Easy to Use]As you move the outer brush, the inside one follows. Now you can sweep both the outer and the inner glass surface simultaneously. [Self-floating]The inner brush adopts a self-floating design, even if the brush falls off, it will not sink, and it will float on the water surface. [Magnetic Brush]The magnets inside the brush provide a super-strong attraction force, allowing the fish tank brushes to be tightly attached to the glass surface. [Comfortable Handle]Comfortable & large handle, comfortable grip, non-slip design, convenient and labor-saving. [Useful]By using this product, you don’t need to dunk your whole arm into the tank. Say goodbye to awkward long-handled tools. Specifications: