Push Button Switch Demonstrator with 4mm Terminals Material_Porcelain this universal charger keeps portable

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

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

and chewing mechanisms in health coursework

Outfitted with six drying pegs along a second tier

and pins outfit groups for hands-on study of pinhole imaging

Push Button Switch Demonstrator with 4mm Terminals Material_Porcelain this universal charger keeps portableMomentary 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.