US$ 17.95
this frog model demonstrates egg
bare copper
field lines
6cm steel frame
Charged porous pot with a zinc rod inside a rectangular polythene jar
Soldering Iron, Model A Subject_Chemistry this frog model demonstrates eggTwenty five watt soldering iron with a wooden bakelite handle and a long life pencil bit, sized for fine soldering work on circuit boards and small electronic components.
US$ 17.95
US$ 24.99
US$ 316.50