Original electrical trade vintage catalog for BENTLEY HARRIS. MANUFACTURING COMPANY. Main office and plant was located at 999 Hector Street, Conshohocken, PA. Manufacturers of varnished tubing, coated & saturated sleeving and fiberglass products. Grade A, B and C tubes and sleeves. Disbound from a large 1944 architect construction materials book, this unique old one page technical specifications brochure would display wonderfully matted and framed. A marvelous addition to your retro electrical equipment library.