The product is a 2022 edition of the NFPA 291 Recommended Practice for Fire Flow Testing and Marking of Hydrants, published by the National Fire Protection Association. This textbook, written in English, covers the subject area of education and reference in the field of fire protection. The book provides guidelines and best practices for water flow testing and marking of hydrants in the USA, making it a valuable resource for those in the industry looking to improve their fire protection systems.