7.9" Polypropylene Stirring Rods with Rounded Ends, 7mm, 12-Pack Racks & Stands_Pipette & Burette Stands 5 by 4-inch ventilation apparatus

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

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

commutator assemblies

this seven-piece set traces fetal delivery from engagement through crowning to placental separation for labor and delivery teaching

Built around a monochromatic yellow LED light source and simplified optics

7.9" Polypropylene Stirring Rods with Rounded Ends, 7mm, 12-Pack Racks & Stands_Pipette & Burette Stands 5 by 4-inch ventilation apparatusTwelve pack of 7. 9 inch polypropylene stirring rods with rounded ends, chemical resistant and heat tolerant for general purpose mixing of classroom laboratory solutions.