26 SWG Bare Copper Wire, 550ft Reel (0.46mm Dia) Base_Octagonal showing how current through an

showing how current through an iron core builds magnetic flux in student investigations

Standard rheostat at 16 ohms and 4A with oxidized constantan winding on a vitreous-enameled steel tube

providing waterproof chemical-resistant splash protection with a smooth nonporous surface that wipes clean

and other biomolecules

Molded black plastic replacement knob sized for the goggle sanitizer cabinet timer switch

26 SWG Bare Copper Wire, 550ft Reel (0.46mm Dia) Base_Octagonal showing how current through anBare 26 SWG copper wire on a 250g reel approximating 550 feet, sized for high turn count solenoids and transformers where the wire needs to wrap many times around a small core.