13-Piece Steel Tuning Fork Set in Wooden Case Subcategory_Globes Autoclavable polypropylene test tube stand

Autoclavable polypropylene test tube stand holding six 25-mm tubes with six drying pins on the back

and four lenses for focal-length investigations

producing distinct audible pitches at varying spin speeds to relate rotational frequency to perceived sound frequency

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

13-Piece Steel Tuning Fork Set in Wooden Case Subcategory_Globes Autoclavable polypropylene test tube standThirteen nickel plated steel forks spanning C 236Hz to C 512Hz at + 5% accuracy, each plain shanked for clamping or holding, supplied in a wooden case for full classroom harmonic investigations.