Fine Iron Filings in Sprinkle Bottle, 100g, 40-60 Mesh Lab Supplies_Thermometers with adjustable slit and draw-out

with adjustable slit and draw-out focusing for examining the spectral composition of light sources

Shows oxygenated and deoxygenated blood paths between heart chambers and alveolar surfaces through seven hand-painted removable parts designed with medical-professional input

adjustable from 0 to 45 degrees with an alignable pulley and included pan and roller

Seventy-times enlarged skin cross section reveals epidermis

Fine Iron Filings in Sprinkle Bottle, 100g, 40-60 Mesh Lab Supplies_Thermometers with adjustable slit and draw-outFine 40 60 mesh iron filings in a 100 gram sprinkle bottle, sized to dust evenly over paper or around a magnet to make field lines visible during introductory magnetism work.