The present invention relates to be adapted to penetrate through skin, tissue and/or the diaphragm of port so that fluid to be transferred to the port needles in the port chamber of port, the port needles include at least one chamber for limiting at least one inner surface, the chamber is suitable for fluid being transferred to proximal part from distal portions, also comprising at least one film for limiting at least one outer surface of the proximal part, wherein it is at most 0. that the outer surface of the proximal part, which includes content,05% nickel (Ni) and/or any Ni compounds and/or be suitable for release at most 0.The Ni of 2 μ g/cm2/ week and/or any Ni compounds.
