Black Replacement Knob for Goggle Sanitizer Cabinet Science at Home_Life Science sized for the next step

sized for the next step up from the 100uA meter when small-signal circuits exceed its full-scale deflection

Designed to measure Planck's constant through the photoelectric effect

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and vestibular structures at visible scale for group classroom demonstrations of auditory anatomy

Two-amp low-voltage power pack delivering 6 to 12V AC for optical benches and demonstration apparatus

Black Replacement Knob for Goggle Sanitizer Cabinet Science at Home_Life Science sized for the next stepMolded black plastic replacement knob sized for the goggle sanitizer cabinet timer switch, restoring rotary control over UV sanitization cycles when the original cracks or breaks off.