From Legamaster

The size A3 plus covers that you can put an A3 paper in the pocket

but you still have to be careful because of the magnet's high strength

nr: FA4562

as the strength depends on how much of the magnet's surface directly contacts the metal

Power magnet, Blok 10x10x5 mm. Auto-translated (SE) From LegamasterStrk magnet af neodymium Powermagnet Lngde: 1 cm. Bredde: 1 cm. Hjde: 0,5 cm. Breevne: ca. 2,8 kg. Firkantet powermagnet med ufattelig holdeevne. Denne magnet er strk nok til at blive brugt p en magnetisk glastavle. SPECIFIKATIONER: Styrke: ca. 2. 800 g. Materiale: NdFeB Magnetisme: N42 Max. temperatur: 80C Overflade: forniklet (Ni Cu Ni)