Chrome steel with true poles length 20 cms.
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50 mm x 50mm magnetic square rubber sheet.
Plotting Compass Glass for Physics Lab – Magnetic needle mounted on pivot in aluminium case with both sides glass with cross lines at 90°. (a) 20 mm (b) 25 mm (c) 50 mm.
Size: 50 x 10 x 5 mm
Made of steel 12 mm diameter, in pairs, half red & half blue (for N & S), spray painted, with keepers.
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