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Set of 12 Drilled Balls
An economical set of 12 drilled balls for all your pendulum experiments. Set contains two each 25mm diameter balls of brass, aluminum, steel, wood, cork, and copper, in a plastic box for easy storage. All drilled balls feature 3mm countersunk holes so pendulum cord knots can be recessed.
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WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
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