the present invention discloses extruded articles , such as tubing or multilumen catheters , having hybrid composition , an axial length and a transverse cross - section orthogonal to the length . the extruded articles have unitary construction and require no assembly . the composition of each cross - section of the article along the length of the article is homogeneous and comprises a first extrudable material and / or a second extrudable material . the percentage of the two extrudable materials in any cross - section varies along the length of the article in a controlled , either continuous or discontinuous manner . the first and second extrudable materials are preferably elastomers having different durometers , color or radiopacity . the weight percentage of one of the two extrudable materials in a cross - section may vary abruptly , smoothly and / or periodically along the length of the article .