150mm Connecting Lead, Model J Subcategory_Erlenmeyer Flasks Used to introduce LED polarity

Used to introduce LED polarity and forward-bias behavior

this 4mm-stackable lead with nickel-plated pins provides reliable connections in student-built bench wiring

sized to fit standard optical-bench lamp houses and stocked together so a burned-out lamp does not stall an experiment

Hard vulcanized ebonite rod that takes on a strong negative charge when rubbed with fur

Classroom pack of ten handheld digital thermometers

150mm Connecting Lead, Model J Subcategory_Erlenmeyer Flasks Used to introduce LED polarityShort 150mm red 2mm stackable lead with nickel plated pins on both ends, sized for compact circuits where stackable plugs branch multiple leads off a single terminal.