Hexagram* Metric Weight Set Set of 54 contains 20 each of 1 g and 5 g weights, plus ten 10 g, and four 20 g weights. Stackable, color-coded weights come in a plastic storage box. Grades 3+ Ages 8+ LER 4292
Highly evacuated electron tube with focusing electron gun and fluorescent screen inclined relative to the beam axis, so that the path of the beam can be seen and the effects of electric and magnetic fields can be studied.
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