Y10 Ferrite Magnets for Arts, Crafts, Model Making, DIY and Hobbies - 25mm x 10mm x 5.1mm thick - 0.41kg Pull - Pack of 20 : Amazon.co.uk: Business, Industry & Science
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About Ferrite Magnet Grades
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Ferrite Block Magnet - 75mm x 50mm x 20mm – Magnet UK