Neodymium Magnet N52 Disc 2.31 kg - Super Flat Magnetic Disc 20 mm Diameter - 20 x 1.5 mm Neodymium Magnets Round Discs [Pack of 10] : Amazon.de: Stationery & Office Supplies
MaerklinMagazin-06-2018_121118_se_klein
QitinDasen Premium GPS-14A Plastic Reed Switch, 2.5 x 14 mm Contact Magnetic Reed Switch, Magnetic Induction Switch, Reed Contact Contact (N/O) Magnetic Control Switch (Pack of 12) : Amazon.de: DIY & Tools