Original electrical trade vintage catalog for SPANG CHALFANT, INC. was located in the Grant Building, Pittsburgh, PA. Manufacturers of Central Rigid Steel Conduit, for electrical raceways and installations of all types. Cenlaco and black conduits are shown. Chart provided with dimensions, price per foot, threads and thickness. Disbound from a large 1943 electrical construction materials book, this unique old one page technical specifications brochure would display wonderfully matted and framed. A marvelous addition to your retro electric equipment library.