United Scientific Supplies PNBP19 Drilled Plastic (Nylon) Ball, 19mm Diameter
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Drilled Plastic (Nylon) Ball, 19mm Diameter
These drilled balls are excellent for use as pendulum bobs or in impact and collision experiments. All drilled balls feature 3mm countersunk holes so pendulum cord knots can be recessed.
Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov