Push Button Switch Demonstrator with 4mm Terminals Material_Porcelain Lead plate with 4mm socket

Lead plate with 4mm socket terminals for the simple-cell apparatus

Pea seed germination model traces cotyledon splitting

this frog model demonstrates egg

this universal charger keeps portable instruments running between sessions without rotating in fresh disposable batteries

deflecting a pivoting cobalt-steel compass needle inside a rectangular conductor frame to show that current generates a magnetic field

Push Button Switch Demonstrator with 4mm Terminals Material_Porcelain Lead plate with 4mm socketMomentary contact push button switch on a base with two 4mm terminals, snapping closed only while the button is held to introduce momentary versus latched switching behavior.