Features: Strong magnetic, stable and waterproof. No damages to the glass. Ergonomic handle improves cleaning action. Suitable for different thick glass aquariums. Suitable for fish enthusiasts, pet store owners, and aquariums staff, this brush is convenient tool for cleaning your aquariums. The cleaning pad removes algae efficiently. Easy your routine while safeguarding your fish tanks ecosystem. Specifications: Component: ABS Size S: About.7.5x6cm/2.95x2.36inch Size M: About.10x7cm/3.94x2.76inch Size L: About.11.5x8.50cm/4.53x3.35inch Size XL: About.13.5x10.50cm/5.31x4.13inch Size 2XL: About.15x10.50cm/5.91x4.13inch S Suitable Glass Thickness: less than 4mm M Suitable Glass Thickness: less than 6mm L Suitable Glass Thickness: less than 10mm XL Suitable Glass Thickness: less than 15mm 2XL Suitable Glass Thickness: less than 25mm Quantity: 1 Pc Package Includes: 1 pc aquariums Magnetic Brush note: 1.Please allow 1-2cm errors due to manual measurement, note that you donot mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.