The LabGard® ES (Energy Saver) AIR NU-543E is a bench top model with base stand options. Model NU-543E holds TUV and NSF listings meeting industry standards EN 12469 and NSF/ASNI 49 at a 254 mm (10-inch) access opening. LabGard offers optimum product quality while reducing the potential for exposure of both product and personnel to airborne biological or particulate chemical agents in low to moderate risk-hazard research and drug preparation or product operations.