They are materials prepared from wood, plastic, metal or a combination of these, which are the most important part of the outer packaging, and prepared for the easy transportation of packaged products by forklift or pallet truck. Usually made of wood, pallets are joined with special ribbed nails to make them more durable. Pallets are cleaned from pests by fumigation or heat treatment in order to prevent harmful insects and pests from reaching another country and harming the plant health of that country in the increasing pallet circulation with foreign trade.