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Unboxing 5 mm magnetic balls
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Video Source: www.youtube.com/watch?v=e5Qk_HWvLfU
Size guide to buy magnetic balls, 3mm, 4mm, 5mm 6mm. You will find 5mm balls is more costly than 3mm. But don't just see it's diameter. You can compare it's actual size and area. For e.g. 5mm is almost three times bigger as compare to 3mm one. • 3 mm area = 28.27 sq mm • 4 mm area = 50.27 sq mm • 5 mm area = 78.54 sq mm • 6 mm area = 113.10 sq mm • Link to buy - • Gearbest：5mm Magnetic Ball - 216Pcs https://gearbest.app.link/2AUFN5vUGK
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