Drilled Ball Set, 1inch Diameter, set of 12, erfect for conducting own pendulum experiments, 3mm hole is drilled down the center of each ball, Comes in a plastic container with foam padding to hold the drilled balls firmly in place
Density Cube, Individual cubes for Density experiments, Available in eight different materials: acrylic, aluminum, brass, copper, nylon, polypropylene, PVC, and steel, Each material is represented by a 1/2inch, 1inch and 11/2inch cube