Floating DesignThe internal floating design avoids the brush sinking in the bottom of aquarium and convenient to take it out of the tank. Strong MagnetismStrong absorb ability and powerful magnetic attraction, as you move the outer magnet, the inside magnet follows, hence cleans the glass. The magnet is strong enough to stay attached and prevent wetting hands when cleaning. Streamlined DesignThe Magnetic Fish Tank Brush consists of a wiping surface, an internal magnet, an external magnet and a non-slip grip. This special streamlined design and beautiful shape, suitable for cleaning algae and scum off the inside of your aquarium easily. Multi-FunctionSoft anti-slippery handle improves the cleaning action, while anti-scratch cleaning pads are highly efficient in removing algae from glass. Labor-saving and time-saving. please do not use it on an acrylic glass fish tank. Size Name:M Features xStrong absorb ability and powerful magnetic attraction xNon slip griped handle improves the cleaning action. xStreamlined design and beautiful shape. xFloating design. xMulti-function and multiple sizes. Specification MaterialPlastic and high magnet material. Size:M:9.5x4.5x7.4cm,suitable for 50-80cm fish tank and fish tank thickness andlt 12mm Weight: M: 160g Package 1xMagnetic fish tank brush