Sanus Foundations Euro EFAS Audio Expansion ShelfOverview Specifications The Sanus Foundations Euro Series EFAS audio expansion shelf features a hand sanded black lacquered finish. The expansion shelf must be combined with the EFAB base to create a fully customizable audio rack. The EFAS has an open architecture design to keep components cool with constant airflow and quick lock clips to route wires for a clean, organized look. General Information Manufacturer Sanus Systems Manufacturer Part Number