For the best safety and performance the NSF 49 is fully certified. This offers the best value in Class II Biological Safety Cabinets that are available on the North American markets. It is fully supported by nationwide sales in Canada and in the USA. It offers a front that is angled with a grille that is a narrow-front, armrests that are raised and a ergonomic work environment. the single-piece stainless steel work tray and low drain pan with a side angled single piece work zone. It has been tested for typical efficiency for micron particles that are better than those offered by HEPA filters or ULPA filters. The antimicrobial coating on all powder coated surfaces. This eliminates the surface bacteria up to 99% within 24 hour of being exposed.