24 SWG Bare Copper Wire, 375ft Reel (0.56mm Dia) Capacity_125mL filled with iron filings whose

filled with iron filings whose alignment renders 3D field lines around any bar magnet up to 0

3g nickel-plated steel balls on a red wood base

Four-times enlarged premium ear model with five separable sections exposes detailed outer

restoring UV-C output in the compatible goggle sanitizer cabinet once the original lamp reaches end of service life

this 6-inch Alnico bar pair extends field lines visibly along the magnet body for full-class iron-filing demonstrations

24 SWG Bare Copper Wire, 375ft Reel (0.56mm Dia) Capacity_125mL filled with iron filings whoseFine gauge 24 SWG bare copper wire on a 250g reel approximating 375 feet, sized for solenoid and transformer windings that need many turns in a compact space.