Unique ldquo;Gasket Guard” system prevents gaskets from taking set thus destroying their effectiveness All shelves have perforated slots (grooves) for optimum gas saturation Units are all stackable with non-slip grip tight feet Standardization of construction means inter changeable shelving All chambers with two or more cubicles havebuilt-in cubicle divider Closed cellular PVC gasketing Units are constructed of optically clear acrylic Each cubicle has two nylon gas nipples 1/8 x 1/4 NPT hose barb fitting (90° elbows) Slip-a-part hinges are standard Sealing clamps are spring loaded for uniform tension Built in hygrometer-(RH) All units have acrylic door guards to prevent warping and possible contamination or loss of internal atmosphere