These chambers use heavy gauge transparent acrylic with formed corners to minimize section joints. The closed cellular PVC gasket is part of the unique “gasket guard” system that prevents gaskets from taking a set. The structural integrity of the cabinets assures economy in cost of operation. After the initial gas purge to clear a cabinet loaded with sensitive components, consumption is reduced to an absolute minimum since the cabinet will not flex or deform and result in leakage. With nylon inlet and outlet gas nipples (1/8” x 1/4”) NPT hose barb style. The adjustable shelves are perforated for complete atmosphere movement and are spaced at 2”.