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For experiments on magnetism, electromagnetism and electrodynamics; Strong bar magnet in a handy size, ideal for student experiments; Compared to ferrite magnets, AlNiCo magnets have a significantly higher remanence flux density (i.e. are significantly “stronger”), and the magnetic force is retained for much longerMaterial: AINiCoPoles: red/green lacquered, blank end facesDimensions: D=10 mm, L=50 mmMass: approx. 28 gadditionally recommended: P3410-1L Supporting plate for bar magnets