comprising a spinneret having a plurality of combined orifices each of the combined orifice comprising first and second capillaries and means for substantially independently metering polymer volumetric flow through each capillary whereby the polymer volumetric flows are substantially insensitive to variations in the dimensions of the capillaries according to another aspect of the invention the first and the second capillaries have different cross sectional areas at the face of the spinneret according to another aspect of the invention the means for metering polymer flow comprises a separate polymer metering passageway associated with each capillary each separate passageway being interposed between a pressurized common plenun polymer source and the capillary with which each passageway is associated each passageway having dimensions selected to provide a pressure drop thereacross at least twice as large as the pressure drop across the capillary with which each passageway is associated according to a second major aspect of the invention there is provided a melt spinning apparatus comprising a plenum continuously supplied with molten polymer a spinneret having at least one combined orifice comprising first and second capillaries a first metering passageway connecting the first capillary to the plenum the first metering passageway providing a pressure drop thereacross at least twice as large as the pressure drop across the first capillary and a second metering passageway connecting the second capillary to the plenum the second metering passageway providing a pressure.