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United Scientific Drilled Ball Set, 1 Diameter (Set of 12)
This high quality set of 12 drilled balls is great for conducting all of your pendulum experiments. Each set contains 2 each of brass, aluminum, steel, wood, cork, and copper balls. A 3mm hole is drilled through the center of each ball. Every set comes in a convenient plastic storage case, with a foam bottom that holds each ball firmly in place. Drilled Ball Set of 12 with 6 different types of drilled balls Perfect for conducting your own pendulum experiments. Contains 2 drilled balls for each brass, aluminum, steel, wood, cork, and copper drilled balls. A 3mm hole is drilled down the center of each ball. Comes in a plastic container with foam

Price is $73.00
Price: $73.32