Replacement crystal board, Crystal: Ge Wafer, P type, Resistivity : 1 approx 10 ohm-cm, Crystal Size : 6x7 x 0.5mm (LxWxThickness), Orientation : <100>, Offset pot : Trim pot, Connection : 4mm safety socket, with adjusted Z pot, for Hall Effect SK006
Radiation Can Kit, Demonstrate how two identically sized cans absorb and radiate energy differently, contains a lamp assembly with reflector and stand(bulb not included), smooth metal can, one black metal can, and thermometer, Includes activity guide