13-Piece Steel Tuning Fork Set in Wooden Case Subcategory_Globes Sixty-five-piece molecular model set with

Sixty-five-piece molecular model set with 32 atoms and 33 bonds for demonstrating bonding angles

and four lenses for focal-length investigations

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

Used to read spectral lines against a 400-700nm graduated scale

13-Piece Steel Tuning Fork Set in Wooden Case Subcategory_Globes Sixty-five-piece molecular model set withThirteen 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.