3D Paramecium Sectional Anatomical Model on Base with Removable Parts, 18 x 8 inch Class_Class B and iron rods for linear-expansion

and iron rods for linear-expansion comparison

this Alnico U-shape carries 45mm pole spacing for compact-bench field demonstrations and motor-effect setups

9A with oxidized constantan winding on a vitreous-enameled steel tube and a phosphor-bronze sliding contact

Long-format 150 x 10mm chrome-steel cylinder pair with half-red

letting students see the plate stack and watch electrolyte action through the side wall

3D Paramecium Sectional Anatomical Model on Base with Removable Parts, 18 x 8 inch Class_Class B and iron rods for linear-expansionThree dimensional Paramecium sectional model with removable parts reveals cilia, oral groove, nuclei, and internal organelles for protist biology teaching.