The magnetic cleaner is equipped with two blades that can be used in different types of fish tanks, easy to install, effective and easy to scrape algae. The inside brush has a unique orienting buoyancy that does not sink into the deepest part of the aquarium and allows easy retrieval of the cleaner every time. Powerful magnetic forces control the inside cleaning brush to follow the outside handle. Flipper standard can be used on glass or acrylic tanks up to 0.20" - 0.79" (5- 20mm) thickness. Magnetic glass cleaning brush is simple and fun to use,no need to reach deep into your tank to clean your aquarium. Ultra low profile design allows cleaning in hard to reach areas of the tank. Specifications: Condition: 100% Brand New Material: Plastic Color: Blue Product Size: 9 x 5 x 4cm / 3.54 x 1.97 x 1.57inch (appr.) Package Included: 1 x Fish Tank Clean Brush