Original insulation trade vintage catalog for KEASBEY & MATTISON COMPANY of Ambler, PA. Makers of the Best in Asbestos. Pipe covering and blocks, aircell board, paper and millboard, corrugated paper, insulating and finishing cements, clothing, tape, sleeving, packings and gaskets. Disbound from a large 1931 construction equipment book, this unique old two page technical data specifications brochure would display beautifully matted and framed. A marvelous addition to your retro industrial design and engineering library. Slight damp stain on outer edge.