Single-Phase Rheostat, Classroom Grade Lab Supplies_Classroom 9-inch sizes for varied pour-transfer

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

sized for sustained workshop work where the smaller 25W and 65W irons can't keep heavy joints flowing solder

3 glass Griffin-form beaker shot glasses hold 3

Single-Phase Rheostat, Classroom Grade Lab Supplies_Classroom 9-inch sizes for varied pour-transferHundred 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.