High-quality material: Original Magnetastico neodymium magnets NdFeB (neodymium-iron-boron alloy) with magnetisation N35 encased in plastic. These are high-quality & strong permanent magnets embedded in a rubberised protective layer (hard rubber protective coat). The high-quality strong magnetic core & the unique coloured plastic coat make these extra strong neodymium magnets a long-lasting magnetic wonder. You will receive power magnets that do not break or splinter. Size & specifications: The extra strong mini-magnets come with a diameter of 12 mm & a height of 6 mm. The magnets are axially magnetised (magnetisation across the thickness, i.e. height). The protective coating made of hard rubber (plastic) surrounds the magnets & makes for improved scratch protection as well as for better grip & handling in everyday life. Due to the coloured plastic coat, the magnets are insensitive to external influences & do not break or corrode. Scope of supply: You will receive 6 pieces high-quality round neodymium magnets rubberised (disc magnets/ round magnets) by Magnetastico in the colour black. An unbeatable combination of extreme strength of the neodymium magnet & "softness" for the surface. The strong super magnets reliably hold the heaviest posters & protect the board or the surface. Versatile uses: Due to the protective layer & the strong neodymium magnetic core, these super magnets are very robust & easy to handle. Whether on whiteboards, magnetic boards, notice boards, glass magnetic boards (magnetic glass panel), magnetic paint, as fridge magnets, office magnets, pin board magnets, whiteboard magnets, for crafting, in the workshop, for hanging photos, these colored round magnets offer a wealth of universal applications at home, in the office, hobby use, or in the garden. Brand quality by Magnetastico: Like all other magnetic Magnetastico products, these strong & permanent neodymium mini magnets are also high-quality companions in everyday life! Thanks to the protective coating, the neodymium super-magnets are perfect for use as a photo magnet, pin board magnet, refrigerator magnet, office magnet, are suitable for magnetic glass-boards & help you organise your everyday life. In our Amazon store, we offer even more magnet colors & also stock multi-coloured sets.