Assorted Ball Set, Set Of 12, 1 Each

The Assorted Ball Set, Set Of 12 by United Scientific is a classroom demonstration set of 12 balls in aluminum, copper, steel, wood, brass and cork. It includes 25 mm drilled balls with 3 mm countersunk holes for pendulum cords, two solid steel balls, three 38 mm balls with hooks and a 38 mm cork ball, packed in a plastic storage box. Physics teachers use it for pendulum, density and collision demonstrations.