Norsk Hydro, the Norwegian oil and energy, light metals and plant nutrition group, is operating the Holmestrand Rolling Mill, the new, cold rolling and slitting system for thinner materials. This means that the company can now approach new customer groups, primarily within the automotive heat transfer area. This investment means that the rolling mill can now supply thinner qualities to markets with stringent quality requirements. Hydro is already a significant supplier of drawn aluminium tubes for heat transfer systems. With this new production equipment now in operation at Holmestrand, Hydro will be the first total aluminium supplier to heat transfer systems in Europe.