A spin pack assembly comprising: a spinneret comprising a first set of spinneret orifices and a second set of spinneret orifices, the spinneret orifices of the first set having geometries different from geometries of the spinneret orifices of the second set; and a metering/distribution plate configured to deliver molten polymer flowing through the spin pack assembly to the spinneret, wherein the metering/distribution plate comprises: a first set of passages configured to deliver molten polymer flowing through the spin pack assembly to the first set of spinneret orifices; and a second set of passages configured to deliver molten polymer flowing through the spin pack assembly to the second set of spinneret orifices; wherein the passages of the plate include horizontally formed channels disposed along a first surface of the plate and vertical through-holes in fluid communication with the horizontally formed channels and extending to a second surface of the plate, the passages for each set are selected to facilitate the formation of extruded fibers through the first and second sets of spinneret orifices having selected deniers, and the metering/distribution plate serves a metering function in that each passage that corresponds with a respective spinneret orifice is selectively dimensioned so as to control the pressure drop of the polymer flowing through the passage and thus the delivery of polymer at a desired flow rate to the respective spinneret orifice. a spinneret comprising a first set of spinneret orifices and a second set of spinneret orifices, the spinneret orifices of the first set having geometries different from geometries of the spinneret orifices of the second set; and a metering/distribution plate configured to deliver molten polymer flowing through the spin pack assembly to the spinneret, wherein the metering/distribution plate comprises: a first set of passages configured to deliver molten polymer flowing through the spin pack assembly to the first set of spinneret orifices; and a second set of passages configured to deliver molten polymer flowing through the spin pack assembly to the second set of spinneret orifices; wherein the passages of the plate include horizontally formed channels disposed along a first surface of the plate and vertical through-holes in fluid communication with the horizontally formed channels and extending to a second surface of the plate, the passages for each set are selected to facilitate the formation of extruded fibers through the first and second sets of spinneret orifices having selected deniers, and the metering/distribution plate serves a metering function in that each passage that corresponds with a respective spinneret orifice is selectively dimensioned so as to control the pressure drop of the polymer flowing through the passage and thus the delivery of polymer at a desired flow rate to the respective spinneret orifice. a first set of passages configured to deliver molten polymer flowing through the spin pack assembly to the first set of spinneret orifices; and a second set of passages configured to deliver molten polymer flowing through the spin pack assembly to the second set of spinneret orifices; wherein the passages of the plate include horizontally formed channels disposed along a first surface of the plate and vertical through-holes in fluid communication with the horizontally formed channels and extending to a second surface of the plate, the passages for each set are selected to facilitate the formation of extruded fibers through the first and second sets of spinneret orifices having selected deniers, and the metering/distribution plate serves a metering function in that each passage that corresponds with a respective spinneret orifice is selectively dimensioned so as to control the pressure drop of the polymer flowing through the passage and thus the delivery of polymer at a desired flow rate to the respective spinneret orifice.