1x5x7.5" hinged book-shaped cardboard box. Cover features illustration of building with name below "Glass Center." Spine reads "Fiberglas/1939 New York World's Fair." 1" horizontal bump (crease) at bottom spine. Box opens to show dimensional Trylon and Perisphere made from fiberglas yarn/tape/braided sleeving tying cord and clear glass marble. Lengthy text inside box lid titled "Contents Of Fiberglas Wonder Box." Text explains the many uses of this flexible/versatile material. Box VF. Box also contains 4.5x6.5" cardboard folder with woven fabric visible through window. Folder top reads "Glass-But Not Fragile!" Bottom reads "Souvenir From Glass Center-New York World's Fair." Fabric reads "Glass Center/1939 New York World's Fair/Fiberglas/Pure Glass In New Forms For New Uses." Lengthy back text is titled "Glass You Can Weave Like Silk." Bottom back reads "Fiberglas Is Manufactured By Owens-Corning Fiberglas Corporation Toledo, Ohio." Folder with fabric N. Mint. Last is 4.25x6.5" book "Can This Be Glass?" 24 pages. Extensive photos/illustrations/text explaining the wonders of fiberglas. A new concept for its day. Book Exc. An interesting group that explains the cutting edge technology exhibited at the fair. Overall Exc./N. Mint.