8.25" Nickel-Plated Sampling Tongs Electricity & Magnetism_Electromagnetism & Motors Optically worked double-convex glass lens

Optically worked double-convex glass lens at 75mm diameter and 100mm focal length

Twelve-ball drilled set in a foam-lined plastic case with two each of aluminum

Greatly enlarged inner ear model exposes bony and membranous labyrinth alongside a sectioned cochlea for vestibular and auditory anatomy teaching

and hinge-distance scales adjustable from 0 to 45 degrees

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

8.25" Nickel-Plated Sampling Tongs Electricity & Magnetism_Electromagnetism & Motors Optically worked double-convex glass lensNickel plated sampling tongs measuring 8. 25 inches in length transfer small solids from stock containers without contamination from bare steel or laboratory users.