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Fine Iron Filings, 8 Oz, 1/2 Pound, 227 grams
3D magnetic field experimentation with safe-keeping screw cap.
Glass Cylindrical Lenses Bi-Concave Power 14D (Focal Length ~72Mm)
Precision lenses for straight line light focus.
Student Glass Prism, Equilateral (Length 100 Mm, Face 25Mm)
Clear, precise prism for scientific experiments.
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