If you deal with international shipping of wood that is thicker than 6mm, the International Standards For Phytosanitary Measures No. 15 (ISPM 15) will apply to you. This International Phytosanitary Measure aims at preventing the spread of disease and insects internationally by means of these woods, since they may destroy other ecosystems. The measures that are part of this standard impact all ISPM 15 pallets, crates and dunnage, which now have to be debarked, fumigated or heat treated and stamped with a mark of compliance also known colloquially as the. Products that are exempted are those made of alternative materials such as plastic, paper, hardwood, ODB and plywood.