With no detectable leaks greater than 1 x 10-6 mL/sec, the new Protector® filtered glove boxes offer the features of low-volume filtered ventilation enclosures while providing an isolated working environment. These glove boxes provide inlet and outlet 99.99% efficient HEPA or 99.999% efficient ULPA filtration and a leak-tight physical barrier to protect the operator from exposure to potentially hazardous materials. They feature particulate containment of 20 nanograms per cubic meter and meet ISO Class 4 standards. Liners are available in either one piece molded fiberglass or Type 304 stainless steel.