The Welger 1721140702 Hub is an original equipment manufacturer (OEM) part designed for various Welger AP series balers, including AP41, AP42, AP45, AP50, AP51, AP52, AP53, AP61, AP63, AP71, AP73, and AP83 models. This genuine hub features an outer diameter of 100mm, an inner diameter of 40mm, a height of 50mm, and a pitch circle diameter (PCD) of 85mm with 6 mounting holes. It weighs approximately 1.1 kg, ensuring reliable performance and proper fitment in agricultural machinery applications.