4-Cell D-Size Battery Holder Capacity_10mL this four-socket E10 lamp holder

this four-socket E10 lamp holder pre-wires four bulbs across a single pair of 4mm banana terminals

resistor networks

Shows oxygenated and deoxygenated blood paths between heart chambers and alveolar surfaces through seven hand-painted removable parts designed with medical-professional input

sized to slot into modular Ohm's-law and series-parallel-circuit investigations

4-Cell D-Size Battery Holder Capacity_10mL this four-socket E10 lamp holderFour cell D size holder in unbreakable plastic with curved retention sides, sized to deliver 6V at the high current capacity of D cells for sustained electromagnet and motor demonstrations.