Clear Interchangeable Dial for Demonstration Meter Material_PVC this 75mm metal-framed apparatus demonstrates

this 75mm metal-framed apparatus demonstrates thin-film interference and the wave nature of light

Polaroid film 45 x 23mm sits in 50 x 50mm plastic frames as a matched pair

Alnico Grade III bar pair at 75 x 15mm with steel keepers in a cardboard box

letting students watch the wire travel along the rail as roughly 3A of current crosses the magnetic field

and cervical spine across the same model for comprehensive head anatomy teaching

Clear Interchangeable Dial for Demonstration Meter Material_PVC this 75mm metal-framed apparatus demonstratesUsed in laboratory apparatus that needs interchangeable rotary scale indicators, this clear dial provides a readable face for measuring angular displacement in physics setups.