Classroom Magnetic Field Demonstrator Capacity_17mL Twenty 1-inch sample squares spanning

Twenty 1-inch sample squares spanning ferrous and non-ferrous metals

this 4-inch carbon-steel needle pivots on a brass cup bearing for low-friction rotation under the local field

and stomatal detail for monocot anatomy teaching

these plastic forceps provide precision grip for specimen manipulation without damaging delicate tissues or structures

Classroom Magnetic Field Demonstrator Capacity_17mL Twenty 1-inch sample squares spanningUsed to render a permanent magnet's field lines visible without iron filings, this demonstrator surrounds a central magnet with 46 small compasses that align in a flowing dipole pattern.