Magnetic Pole Viewer, made of a special soft magnet material enclosed in a plastic sheet, is a common-used instrument inspecting magnet material. Its main function is to view the distribution of magnetic lines and poles. Through the viewer, we can directly see a magnet's pole numbers, distance between poles and poles' division etc., which can make us judge the magnetization status. The Magnetic Pole Viewer is cheap and easy to take and operate. It is a necessary portable tool for anyone in the trade of magnet material.