Premium Oxygen (O) Spectrum Tube, 26cm Subcategory_Electromagnetism Student kit for constructing a

Student kit for constructing a working DC motor from component parts

Three-speed manual transmission with reverse in a clear-plated case

Entry-level two-part human skull model separates the skull cap to reveal the cranial cavity for introductory head-anatomy teaching at secondary and college levels

Fullerene C60 kit with 60 atoms and 90 bonds for building the spherical cage structure characteristic of fullerene carbon allotropes

Premium Oxygen (O) Spectrum Tube, 26cm Subcategory_Electromagnetism Student kit for constructing aResearch grade oxygen spectrum tube at 26cm with a 10cm central capillary, producing oxygen's characteristic emission lines for spectroscope viewing of atomic emission and quantum energy levels.