Single-Phase Rheostat, Classroom Grade Lab Supplies_Classroom large enough for whole-class visibility

large enough for whole-class visibility when tracing magnetic field lines around bar magnets

9-inch sizes for varied pour-transfer operations in chemistry and biology labs

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

each 20mm on edge with a top hook for suspending in water during Archimedes-principle and buoyancy experiments

Single-Phase Rheostat, Classroom Grade Lab Supplies_Classroom large enough for whole-class visibilityHundred ohm 1. 75A single phase rheostat with cover protected constantan winding on a 200x56mm tube and 4mm safety socket terminals, with plus or minus 10% nominal value tolerance.