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When you set up to conduct an electromagnetism experiment, you'll want this set of wire coils.
-- Included are two plastic bobbins (2 cm diameter) with enameled wire coils, one has 200 windings, the other 400 windings, (0.4 mm diameter each) and two steel plated iron bars (6.8 mm diameter each).
Price: $39.95 Click here for more info.
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