A device for use in a microfiber and/or nanofiber producing system, the device comprising: a substantially circular body, an internal cavity disposed in the body, wherein the internal cavity receives material to be produced into a fiber, one or more openings that allow material to be passed from the internal cavity to the exterior of the body; a coupling member , wherein the body is couplable to a driver through the coupling member; wherein, during use, rotation of the body causes material in the internal cavity to be passed through one or more of the openings and ejected from one or more material outlets to produce micro fibers and/or nanofibers, and wherein further the body has an outer radial surface defining a sidewall having a height, wherein the sidewall has a plurality of radial extensions defining vertical grooves angularly therebetween, each radial extension having an outer radial periphery having one or more of the openings that allow material to be passed from the internal cavity to the exterior of the body and a gas outlet positioned proximate to one or more of the openings ; and wherein the coupling member includes a central conduit, which in turn includes two or more lumens, of which a first lumen is used to introduce the material into the body, and a second lumen is used to pass gas into the device and out through gas outlets while being inhibited from entering the body which holds the material. a substantially circular body, an internal cavity disposed in the body, wherein the internal cavity receives material to be produced into a fiber, one or more openings that allow material to be passed from the internal cavity to the exterior of the body; a coupling member , wherein the body is couplable to a driver through the coupling member; wherein, during use, rotation of the body causes material in the internal cavity to be passed through one or more of the openings and ejected from one or more material outlets to produce micro fibers and/or nanofibers, and wherein further the body has an outer radial surface defining a sidewall having a height, wherein the sidewall has a plurality of radial extensions defining vertical grooves angularly therebetween, each radial extension having an outer radial periphery having one or more of the openings that allow material to be passed from the internal cavity to the exterior of the body and a gas outlet positioned proximate to one or more of the openings ; and wherein the coupling member includes a central conduit, which in turn includes two or more lumens, of which a first lumen is used to introduce the material into the body, and a second lumen is used to pass gas into the device and out through gas outlets while being inhibited from entering the body which holds the material. wherein, during use, rotation of the body causes material in the internal cavity to be passed through one or more of the openings and ejected from one or more material outlets to produce micro fibers and/or nanofibers, and wherein further the body has an outer radial surface defining a sidewall having a height, wherein the sidewall has a plurality of radial extensions defining vertical grooves angularly therebetween, each radial extension having an outer radial periphery having one or more of the openings that allow material to be passed from the internal cavity to the exterior of the body and a gas outlet positioned proximate to one or more of the openings ; and wherein the coupling member includes a central conduit, which in turn includes two or more lumens, of which a first lumen is used to introduce the material into the body, and a second lumen is used to pass gas into the device and out through gas outlets while being inhibited from entering the body which holds the material. <EOS>