1. The JOHN DEERE D450 Self-Propelled Hay and Forage Windrowers TM108819 is a high-quality agricultural machine designed to efficiently cut and windrow hay and forage crops. With its self-propelled feature, it offers ease of use and maneuverability in the field. This product comes with a free online manual, providing users with comprehensive instructions and guidance for optimal operation and maintenance. The JOHN DEERE D450 is a reliable and durable choice for farmers looking to enhance their hay and forage harvesting capabilities.