8-Piece Aluminum Scientific Tuning Fork Set with Wooden Case Pack Size_50 levitating above one another when

levitating above one another when oriented with like poles facing

letting students trace renewable-energy conversion step by step

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

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 levitating above one another whenEight 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.