1、DETAILED OBSERVATION: The professional aquarium magnifying glass magnetic observer allows you to observe the marine fish and other fish in the aquarium in more detail. 2、BRUSH THE FISH TANK: This product has the function of swiping the fish tank, but please note that the main function of the fish tank observation is to view the details of the coral fish in the fish tank. 3、MAGNETIC DESIGN: The reef magnifying glass lens has a magnetic design, which allows you to move the magnifying glass anywhere on the outer glass of the fish tank to observe the details in the fish tank. 4、WATERPROOF DESIGN: The aquarium magnifying glass magnetic observer adopts waterproof design so that it will never rust, which is very safe for your coral fish or plants. 5、PLASTIC AND GLASS: The aquarium magnifying glass magnetic observer is made of plastic and glass. Please handle it gently when using it to prolong its service life. Item Type: Aquarium Magnifier Magnetic Viewer Material: Plastic＋Glass Scope of Application: Approx. 19mm/0.74in Glass Can Be Clamped Applicable Fish Tank: ≤Approx. 60cm/23.62in Fish Tank 1 x Magnifying Glass 1 x Cleaning Cloth 1 x Magnetic Frame