Original brick trade vintage catalog for CONSTRUCTION SPECIALTIES INC. Main office was located at 55 Winans Avenue, Cranford, NJ. Manufacturer of cast aluminum brick size vents. Hollow casings with attractive louvered faces, readily built into exterior walls to provide permanent, storm proof venting of confined spaces. Cast iron or bronze may also be supplied. This unique 1958 old four page technical engineering brochure would make a marvelous addition to your retro design library. Pages are loose and contain a tiny amount of residual glue on edge.