Although new and unused, please understand that this item has been stored at home for a long time. A specialized book containing detailed explanations and illustrations of building materials. - Title: New Building Materials I [Structural Materials Edition] - Title: New Building Materials II [Component Materials Edition/Functional Materials Edition] - Publisher: Kenchiku Kogakusha (Architectural Engineering Publishing) - Contents: Detailed explanations and illustrations of building materials - Number of pages: Approximately 200 pages per volume - Language: Japanese Thank you for looking.