7.9" Polypropylene Stirring Rods with Rounded Ends, 7mm, 12-Pack Racks & Stands_Pipette & Burette Stands US-milled iron filings at 40-60

US-milled iron filings at 40-60 mesh in a 250-gram translucent screw-cap bottle

commutator assemblies

U-magnet and brass-rail apparatus that demonstrates the motor effect

Built around a monochromatic yellow LED light source and simplified optics

5 by 4-inch ventilation apparatus modeling historic mine-gallery airflow and domestic chimney convection through a candle-driven hot-air-rise demonstration

7.9" Polypropylene Stirring Rods with Rounded Ends, 7mm, 12-Pack Racks & Stands_Pipette & Burette Stands US-milled iron filings at 40-60Twelve pack of 7. 9 inch polypropylene stirring rods with rounded ends, chemical resistant and heat tolerant for general purpose mixing of classroom laboratory solutions.