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. Note: Due to strong suction, do not attempt to pull it apart forcefully. Simply rotate the outer part 90 degrees to release. Medium size fits glass thickness up to 0.23", large size fits 0.25"–0.36", and extra large size fits 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 brush becomes detached, it floats on the water surface, making retrieval easy without getting your hands wet or disturbing aquatic life. When not in use, it can remain attached to the aquarium glass for convenient storage. [Comfortable Grip] Designed with ergonomic principles, the cleaner fits comfortably in most hand sizes, offering a secure and comfortable grip. Available in three sizes: Medium: 10x4x5cm, Large: 12.5x5.5x5.8cm, Extra Large: 14.5x6.3x6.5cm. [Wide Applicability] Suitable for both freshwater and saltwater aquariums. Can also be used to clean window glass. A practical and thoughtful gift for aquarium owners.