Halogen Light Source for Optical Bench, 12V Entomology & Zoology_Zoology Models 5cm brass rotor balanced on

5cm brass rotor balanced on three pairs of adjustable cast-iron pivots

the shorter focal distance lifting magnification for fine-print and specimen detail work

Six-piece laboratory-glass barware set bundles beaker shot glasses

passing freely through the ring at room temperature but halted by the ring after flame heating expands the metal

Equal-mass density set in aluminum

Halogen Light Source for Optical Bench, 12V Entomology & Zoology_Zoology Models 5cm brass rotor balanced onStand mounted halogen lamp rated 12V 21W, with a positioning lug rod that locates accurately on standard optical benches for lens, mirror, and refraction demonstrations.