This brush remover is suitable for cleaning the glass of the fish tank. This super strong magnets can apply for use with varying glass thicknesses. It can float which will avoiding lost magnets on the bottom of your aquarium. Feature - Color: Blue. - Material: Magnet and plastic. - Size: Approx. 4 x 4 x 3.5 cm. - Made of premium material for durable and practical use. - Unique design, convenient to use. - Floats avoiding lost magnets on the bottom of your aquarium. - Anti scratch cleaning pads that are highly efficient in removing algae from glass. - Dear buyer, Due to lighting effect,monitor's brightness,manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand Thank you