An optical fiber cable comprising a polymeric component, in particular a buffer tube, is described, suitable for both terrestrial and undersea uses. The polymeric material forming the component comprises a copolymer of propylene with a C4-C8α-olefin and preferably a nucleating agent disbursed therein. The obtained component shows improved dimensional stability, which guarantees its non-deformability, and high transparency and can be extruded at lower extrusion temperatures.
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