Magnetic Double Sided Aquarium Glass Cleaner & Scrubber Brush Magnetic Aquarium Glass Cleaner, Fish Tank Glass Scrubber, Magnetic Cleaning Brush, Double Sided Aquarium Cleaning Brush [Super Magnetic Force] The magnet in the magnetic brush is made of NdFeB, providing stronger magnetic force than standard models. It adheres securely to fish tank glass and will not fall off during use. Note: Due to strong suction, do not attempt to pull the parts apart forcefully. Simply rotate the outer part 90 degrees to separate. Medium size fits glass thickness up to 0.23", large size fits glass 0.25"–0.36", and extra large size fits glass 0.25"–0.62". [2 in 1 Function] This magnetic brush combines a scrubber and scraper in one unit, effectively cleaning glass surfaces and removing stubborn residue, including in corners. [Self-Floating Design] If the magnetic connection is released, the inner part floats and will not sink to the bottom of the aquarium. This allows for easy retrieval without reaching into the water or disturbing your fish. When not in use, it can remain attached to the glass surface for convenient storage. [Comfortable Grip] Designed with ergonomic principles for comfortable handling and secure grip. Available in three sizes: Medium: 10 x 4 x 5 cm, Large: 12.5 x 5.5 x 5.8 cm, Extra Large: 14.5 x 6.3 x 6.5 cm. [Wide Applicability] Suitable for both freshwater and saltwater aquariums. Can also be used to clean window glass. A practical and thoughtful gift option.