The Tunze Care Magnet Nano (220.010) consists of an ergonomic handle and special plastic blades made of wear-resistant high performance plastic. The patented slim Care Magnet is significantly more compact than conventional algae magnets with a large cleaning surface; it is unobtrusive and therefore able to remain within the aquarium without disrupting the overall scenery. With the Care Magnet there is a 3 mm gap between the magnet and the glass so it will not scratch the inside of the aquarium (as sand can not be trapped between the magnet and the glass).
Magnet dimensions: width 45 mm (1.77 in.), length 78 mm (3 in.)
Suitable for glass thickness from 6mm (1/4″) to 10mm (3/8″)