an improved nozzle arrangement for use in a cooling zone of a rolling mill is formed completely of plastic , preferably abs plastic , and includes an elongated , substantially cylindrical hollow body portion that defines an longitudinally extending conduit having a cooling fluid intake port that smoothly converges into an internal flow channel of an integrally formed head portion that is provided with a cooling fluid outlet port . an elongated baffle member is positioned within the cylindrical body portion and extends substantially the entire length thereof . the baffle member itself is formed of a unitary plastic member , also preferably abs plastic , and has a x - shaped cross - section . constructing the nozzle of plastic saves considerable replacement costs associated with the use of such nozzles in rolling mills and also enables the nozzles to be recycled . in addition , due to the specific construction of the nozzle , laminar flow is assured which enhances its cooling function .