Neodymmagnete (NdFeB Magnetization strongest available) the highest quality. Gold surfaces in polished quality speak for themselves. Specifications: Type: Disc 5 x 2 mm (max. + / - 0.03 mm) Magnetization N52 N / S orientation 1mm Temperature to 80 ° C The Echtvergoldete magnets can be used in many fields are used. e.g. slight possibility for lid closure and fold in the model, with just 2 K Glueing Adhesives. They can also easily by people with nickel allergy to be used.