ART IFACT 10 Pieces of 10mm Neodymium Magnets - N52 Ball Magnets Sphere - Rare Earth NdfeB Fridge Magnet, Multipurpose Office Magnets, Magnetic Paper Holder Pack of 10 Price in India -
Magnetic sphere / Sphere magnet Ø 12.7 mm nickel N40 - holds 2.8 kg
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5mm 1000PCS Per Set Sphere Ball Magnets - China Magnetic Ball, 5mm Magnetic Balls | Made-in-China.com
Master Magnetics Neodymium Sphere Magnet
Sphere Magnets Gold Coated 1/4 in Dia Neodymium Rare Earth Ball - Applied Magnets - Magnet4less
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Construction manual for a ball made of magnetic spheres - supermagnete.de