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Tuning Fork - 512 Hz.
save 52%
3.36
gr. 8 to 12
100 Strips of Varied pH Paper
save 62%
1.90
gr. 8 to 12
science equipment
>
measuring weather
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wire gauze
Aneroid Barometer
gr. 8 to 12
Mounted on a plastic base; comes with a ring for easy hanging. Overall diameter is 5"....
more
save 43%
34.76
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