Interchangeable Dial for Demonstration Meter, Model B Graduations_50mL 3 inches with cork-lined jaws

3 inches with cork-lined jaws

this 2mm-plug lead pairs a banana plug at one end with a crocodile clip at the other for fine-pitch experimental work

sized for cross-bench reach in small-scale electronics work where 4mm hardware is too large

replacing the dry-cell stack on student-circuit benches

Optically-worked glass double convex lens with a 150mm focal length and 1

Interchangeable Dial for Demonstration Meter, Model B Graduations_50mL 3 inches with cork-lined jawsUsed to reconfigure the demonstration meter as a different ammeter or voltmeter, this interchangeable dial carries an integrated shunt or voltage multiplier sealed in its laminated panel.