Original door trade vintage catalog for THE DURAFLEX COMPANY. Main office was located at 3500 NW 52nd Street, Miami, FL. Manufacturers of door sealing weatherstripping. A soft flexible vinyl, in a rigid vinyl housing, engineered to allow door to open and close easily, yet the doorway is snugly sealed. Model VS-300, VS-302B, VS-333. Flip Flop automatic door bottom also featured, with installation instructions. This unique 1962 old four page building construction brochure would be a marvelous addition to your retro architectural design and engineering library. Pages are loose and contain small amount of residual glue on edge.