Delicate design: soft bristles, the internal parts can be cleaned quickly and effectively without scratching the aquarium glass. The internal float prevents the brush (the part in the water tank) from sinking into the bottom of the aquarium, making it easier to remove from the water tank. Easy to use: through a strong magnetic magnet, which can control the inner cleaning brush to follow the outer handle. The interior is cleaned while wiping the exterior. Multifunction: more convenient and quick cleaning of dirt and residue in the water tank. And it won't scratch the glass. This product can not only clean the aquarium, but also clean the windows and walls. It also has a very good effect. Premium Material: Made of high quality plastic, sturdy, anti-corrosion and durable. 3 sizes for you to choose, meet your different needs. Features: Condition: new. Item type: magnetic aquarium brush. Material: plastic. Usage: aquarium cleaning. Number of products: 2 pieces Color: black red Size: 87*43*59.5mm Suitable for aquariums less than 40cm Applicable cylinder wall thickness less than 4cm < p>Contents: 1 magnetic aquarium brush (two parts). 1 blade head. Note: 1. The magnetic brush has strong magnetism, so do not let children touch it, which is dangerous. 2. Patients with pacemakers are strictly prohibited from using it. 3. Due to the particularity of ultra-white aquariums and acrylic aquariums, it is recommended to use the intermediate filter cotton.