Original insulation trade vintage catalog for THE RIC-WIL COMPANY, was located in Cleveland, OH. Manufacturers of heat insulating products. Underground conduit and pipe covering used in insulation of steam and hot water pipes. Pictured is the conduit, multiple pipe construction, with base drain. Disbound from a large 1916 architectural catalog, this unique old one page technical brochure would display beautifully matted and framed. A marvelous addition to your retro industrial equipment library. Page is detached and may contain a small amount of residual glue on edge.