The product is a 2020 paperback textbook titled "91 Standard for Exhaust Systems for Air Conveying" authored by the NFPA. It is designed for adult education and further education levels, with a focus on safety in exhaust systems for air conveying. Published in the United States, this book is a valuable resource for those seeking to understand and adhere to the necessary standards and guidelines in this field. The textbook is written in English and is available in trade paperback format.