The Bestgle Magnetic Aquarium Fish Tank Algae Glass Cleaner Scrubber Brush is a powerful and easy-to-use tool for cleaning your fish tank. Made of plastic and super strong magnet, this brush has an absorbable quality that makes it perfect for removing algae and other unwanted substances from your glass. With a size of 3.7 inches x 1.7 inches x 2.8 inches, this brush is also strong enough for use in thicker tanks. The soft anti-slip handle improves your cleaning action, while the floating design prevents the brush from sinking into the deepest parts of the tank.