4-Socket Series MES E10 Lamp Holder Capacity_250mL Polished hardwood test tube rack

Polished hardwood test tube rack with a traditional two-tier design

this 4mm-stackable safety lead carries up to 12A through nickel-plated split-hollow pins on both ends

the foundational galvanic cell behind any introductory electrochemistry lecture

showing that air resistance — not mass — accounts for differences in fall time under gravity

5V to demonstrate the wet-cell ancestor of the modern dry battery in early electrochemistry units

4-Socket Series MES E10 Lamp Holder Capacity_250mL Polished hardwood test tube rackFour socket E10 lamp holder pre wired in series on a hard plastic base with two 4mm banana terminals, sized for hands on demonstrations of series circuit current and voltage division.