Protector Combination Glove Boxes provide inlet and outlet HEPA or ULPA filtration and a leak-tight physical barrier to protect the operator from exposure to potentially hazardous materials and perform work with contamination-sensitive materials under vacuum or in an inert environment. Protector Combination Glove Boxes feature two internal valves to convert the glove box from a flow-through filtered box to an inert atmosphere glove box. Need an ultrapure inert atmosphere? All Protector Combination Glove Boxes are compatible with the new AtmosPure Re-Gen Gas Purifier accessory, which has the capacity to remove up to five liters of oxygen (13,500 ppm) and 660 grams of moisture (18 million ppm) at standard temperature and pressure (STP).