The product is a textbook titled "NHIE Mechanical Systems & NHIE Content Vol 1" authored by Bruce Barker and published in 2019. This textbook focuses on mechanical systems and provides content relevant to mechanical subjects. It is available in paperback format and serves as a valuable resource for home inspectors seeking to gain a deeper understanding of mechanical systems in residential properties. EBPHI - Examination Board of Professional Home Inspectors Used paperback book in good condition due to general wear to shape of book as well as some evidence of page wear.