Profile: TDI International, Inc. specializes in precision hand tools & cabinets. Our acrylic desiccators have spring loaded latches for air-tight door seals & electropolished stainless steel continuous piano door hinges for maximum door support. All our desiccator storage cabinets are constructed with Ultra Nitro-Flow® compartment flow-through which achieve a single pressure condition throughout the cabinet. This allows for a single N2 automatic bleeder valve required per cabinet. Our microruler is mounted in gold colored, non rolling hanles, each scale is individually packaged in a plastic enclosure, and it may be used directly under a microscope or magnifier.