8-Piece Aluminum Scientific Tuning Fork Set with Wooden Case Pack Size_50 delivering wheel-driven power to a

delivering wheel-driven power to a lamp or a Newton color disc

holding volume constant across specimens for isolated density comparisons

Twelve-ball drilled set in a foam-lined plastic case with two each of aluminum

levitating above one another when oriented with like poles facing

Sodium chloride lattice kit with 27 color-coded gray and green atoms plus 54 connectors for building the full cubic NaCl crystal structure in three dimensions

8-Piece Aluminum Scientific Tuning Fork Set with Wooden Case Pack Size_50 delivering wheel-driven power to aEight aluminum shank tuning forks tuned to scientific pitch (C4 = 256Hz) and ranging from 5 9 16 to 7 1 8 inches, each foam protected in a wooden case with frequencies labeled.