Lead (Pb),
e.g. in solder, pre tinned wires, Plastic parts (stabilizers), Batteries.

Cadmium (Cd),
e.g. as stabilizers in plastics, pigmentation of paint / ink, printed circuit boards, SMD-Chips-Resistors, Infrared Detectors Semiconductors, Connectors, Insulting materials, Batteries, etc.

Mercury (Hg)
e.g. Thermostats, Sensors, Relais, Switches, Batteries, packaging materials, Ink, etc.

Chrome VI (CrVI )
e.g. yellow passivated screws or other mechanical parts

Polybrominated biphenyl (PBB) / Polybrominated diphenyl ethers (PBDE)
Both as flame retardants e.g. Insulations materials, printed circuit boards, plastic material for connectors, Housings, Bobbins