Made of steel, half red & half blue ( for N & S ) spray painted, with keepers.
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Bell Electric for Physics Lab – With detachable plastic cover, dome gong. For use on 3 to 12 V AC/DC supplies.
An annular magnet with face poles. Internal dia 12.5 mm, External dia 30 mm, thickness 6.5 mm
Size: 50 x 10 x 5 mm
Made of steel, 12 x 5 mm in pairs ; half red & half blue (for N & S) spray painted, with keepers.
There are no reviews yet.