Hollow Cylinder Electrostatics Demonstration Apparatus engine models pairing a 2-inch plastic wheel

pairing a 2-inch plastic wheel with a metal bearing for smooth

low-consumption fan motor

dimensioned as the matched replacement carriage for the LED ray box (PH0602ALED) track when an original rider is lost or damaged

Three 6% chrome-steel horseshoes at 75mm

this 250mL polypropylene pitcher features molded graduations and autoclavable chemical-resistant construction

Hollow Cylinder Electrostatics Demonstration Apparatus engine models pairing a 2-inch plastic wheelPith balls suspended both inside and outside a charged metal cylinder make visible proof that electrostatic charge resides only on the outer surface of a conductor.