This poster summarizes the status of the Preliminary Design of the MEGARA Fiber Units, as well as the prototypes that are carrying out during this phase. MEGARA has a central bundle covering 12 arcsec x 14 arcsec on sky, plus a Fiber MOS positioner, able to place up to 94 mini-bundles 7 fibers each in MOS configuration. A field lens provides a telecentric focal plane, where the bundles are located. Microlenses arrays couple the f/17 beam of the GTC to the f/3 at the entrance of the fibers. Finally, the fibers, organized in bundles, end in the pseudo-slit plate, which shall be the MEGARA spectrograph entrance plane.