Structure made of 19 mm Thick Plyboard covered with sunmica from outside. Work bench of perforated stainless steel. Sides of work bench covered with transparent acrylic sheet. Front acrylic door of collapsible type. Properly balanced blowers fitted on 1/4 H.P. Electric motor provided on the top portion to supply sufficient air to HEPA filter provided on top of work bench horizontally to supply clean air to the work bench vertically. Pre-filters provided on the top to supplu pre filtered air to the blowers. One flourscent tube and one U.V. Germicidal tube provided over work bench. Static pressure manometer fitted on top. Back cover fixed with screws for convenient removal for attending blowers, filters and motor when needed.