Real Coal Specimen Set with Cotton Bag, 5-Piece Lab Supplies_Sieves supporting 18 mm thermometers upright

supporting 18 mm thermometers upright and protected between laboratory uses

using wide-pad threaded metal screws for secure fastening

5V to demonstrate the wet-cell ancestor of the modern dry battery in early electrochemistry units

transparent housing revealing the hydropower conversion inside the casing

Longitudinal head-throat-lung cross section reveals the full air pathway from nostrils through trachea to alveoli at half life size for respiratory teaching

Real Coal Specimen Set with Cotton Bag, 5-Piece Lab Supplies_Sieves supporting 18 mm thermometers uprightBundled in a cotton drawstring bag with a linked crystal growing activity, this pack of five small lumps of genuine American anthracite coal doubles as novelty and classroom specimen.