Precise HEPA-Filtered Glove Boxes protect operators from hazardous airborne particulates and powders. The units feature a one-piece molded, medium-density polyethylene shell with a black, chemical-resistant work surface sealed to the glove box floor. A viewing window of ¼ thick laminated safety glass and space-saving inner and outer transfer chamber doors pivot upward, are counterbalanced, and are equipped with quick-latches and pressure relief valve. Main chamber interior has a volume of 13 cu/ft and the transfer chamber measures 11.0× 12.0. Inlet and outlet HEPA filters are 99.99% efficient on 0.3 micron particulates and include a test port for challenging HEPA filter integrity. The blower has a speed control capable of airflow from 13 CFM to 100 CFM.