Original insulation trade vintage catalog for THE NATIONAL MINERAL WOOL ASSOCIATION. Main office was located at 1270 Sixth Avenue, New York City, NY. Make Your Home Cool in Summer, Warm in Winter, Safe from Fire with Mineral Wool, also known as Rock Wool, Slag Wool and Glass Wool. Unbound from a large 1940 architectural catalog, this unique old four page technical brochure would exhibit beautifully matted and framed. A fantastic addition to your retro insulation collection. Pages are detached and may contain a small amount of residual glue on edge.