EM Series hopper magnets should be installed in your material supply hoppers to trap ferrous metal that ends up in your material. They help reduce the likelihood of damage to your machine.
The EMS square hopper magnet measures 7"x7" (190mm x 190mm) square, and the EMR round hopper magnet is 9" (240mm) in diameter.
EMS Square Hopper Magnet
EMR Round Hopper Magnet