the original bar magnets used by gibbs was the barium oxide ones and ive searched world wide on the net for them and found none so wherever he got his from they are not listed online either selling them either so as far as i can say they cant be found or brought and if he buys them why aren't they or the place who sold him them listed online as a seller so i gave up trying to find them so use powerful rare earth ones rectangle ones stuck together to make a bar magnet they sure do vibrate from the magnetic fields of the electromagnet
