Simply put one of the two pieces into the aquarium tank, put the other piece outside of the tank and they can be adsorbed together.
Move the outside piece and the inside one will move likewise, thus, you can clean inside and outside of the aquarium tank at the same time.
The internal floating design makes it convenient to be taken out if it accidentally fall into the aquarium.
Package:1 x Magnetic brush
The magnet is strong enough as to stay attached even when you have non standard type tanks
Material:Plastic and high magnet material,Size: Approx 7cm X 3.5cm X 6.5cm ( 2.8″ X 1.4″ X 2.6″)
Floating design avoids lost magnets on the bottom of your aquarium and make it convenient to use
Streamlined design and beautiful shape, suitable for use with varying glass thickness
Suitable for 30-50cm fish tank and magnetic force available less than 5mm