Electrostatic Friction Rod Kit, 3 Cloths and 3 Rods Type_Round End the wider face area handling

the wider face area handling broader incident beams for refraction and wavelength experiments

Polished 8cm brass sphere on an ebonite-insulated metal base

with retractable hooks for tandem stacking during physics force experiments

the lower-friction variant of the metal-bearing bench-clamp pulley in the series

Wooden-framed abacus with two steel wires of 20 beads each on a 13

Electrostatic Friction Rod Kit, 3 Cloths and 3 Rods Type_Round End the wider face area handlingElectrostatic friction rod kit pairing wool, cotton, and silk cloths with glass, ebonite, and acrylic rods for triboelectric charge generation experiments in series.